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P0101 on 2007-2010 GMC Sierra 2500HD: MAF Sensor Problems and Fixes

On a 2007-2010 GMC Sierra 2500HD, code P0101 is most often caused by a dirty Mass Air Flow (MAF) sensor. The most common and cost-effective first step is to clean the sensor with dedicated MAF sensor cleaner, which costs about $15. If the issue persists, inspect for air leaks in the intake system, especially cracked intercooler boots on Duramax models. Aftermarket oiled air filters are a very common culprit and should be replaced with a stock paper filter.

23 minutes to read 2007-2010 GMC Sierra 2500HD

Most Likely Cause

Dirty or Contaminated MAF Sensor

Difficulty

1/5

Est. Time

1 hrs

DIY Doable?

✅ Yes

Shop Labor

$75 – $450

Parts Price

$10 – $250

⚠️ Drivable, but... — You can drive, but expect reduced power, poor fuel economy, and rough idling. On Duramax models, this code often triggers a 'Reduced Engine Power' message, which can be unsafe in traffic. Long-term driving can damage the catalytic converter or Diesel Particulate Filter (DPF) due to an incorrect air-fuel mixture.

Key Takeaways

Always start by cleaning the MAF sensor with dedicated cleaner; this is the most common and cheapest fix.
Thoroughly inspect the entire air intake system for cracks or loose clamps, especially the intercooler boots on Duramax models.
Avoid using over-oiled aftermarket air filters, as they are a known cause of MAF sensor contamination and P0101 codes on these trucks.
Only replace the MAF sensor after you have cleaned it and confirmed there are no air leaks in the system.
If the code persists on a Duramax after checking the MAF and intake, the EGR system is a potential, though less common, culprit.

The trouble code P0101 stands for "Mass Air Flow (MAF) Circuit Range/Performance." This means the engine's computer (PCM) has detected that the signal from the MAF sensor is not within the expected range for the current operating conditions. The PCM compares the MAF sensor's reading of incoming air volume to data from other sensors like the throttle position sensor (TPS) and engine speed (RPM). When the actual airflow reading doesn't correlate with what the computer expects, it triggers the P0101 code.

What's Unique About the 2007-2010 GMC Sierra 2500HD

For this generation of Sierra 2500HD (GMT900), the P0101 code is a common complaint. On models with the 6.6L LMM Duramax diesel engine, the system is particularly sensitive. Aftermarket oiled air filters are a notorious cause, as the oil can contaminate the MAF sensor element. In one documented case, a visually clean K&N filter was restricting airflow enough to set the code, and replacing it with a stock filter was the final fix. Furthermore, the complex intake plumbing on the turbocharged Duramax is prone to developing leaks at the intercooler boots, allowing unmetered air to enter the system and trigger the code. While gas engines (like the 6.0L V8) are also susceptible, the Duramax's specific intake design and sensitivity to modifications present these unique and frequent failure points.

Symptoms You May Notice

Check Engine Light is on
Reduced engine power ('limp mode')
Rough idle
Hesitation or stumbling during acceleration
Poor fuel economy
Black smoke from the tailpipe
Difficulty starting the engine

⚠️ Don't Waste Money on the Wrong Fix

Replacing the MAF sensor without first cleaning it.
Replacing the MAF sensor when the actual problem is an air leak in a cracked intake boot downstream from the sensor.
Replacing oxygen sensors, as the P0101 code can sometimes be accompanied by lean/rich codes (P0171/P0174).
Continuing to use an aftermarket oiled air filter after cleaning or replacing the MAF sensor.

Most Likely Causes

Dirty or Contaminated MAF Sensor 🔴 High Probability Oiled aftermarket air filters are a very common source of contamination on these trucks, especially the Duramax models. Dust and debris can also accumulate on the sensor's hot wire over time.
How to confirm: Remove the sensor from the intake tube (usually held by two Torx screws) and visually inspect the small wires or filament inside. If they appear dirty, oily, or have debris on them, they need cleaning.
Typical fix: Clean the sensor element using only dedicated Mass Airflow Sensor cleaner spray. Do not touch the wires. Allow it to air dry completely before reinstalling. 🎬 Watch: A detailed guide on how to clean your MAF sensor.
Est. part cost: $10-$20
Air Leak in Intake System 🟡 Medium Probability On Duramax models, the rubber boots connecting the charge air cooler (intercooler) pipes can crack with age and heat, creating leaks. On both gas and diesel models, the main intake duct can also crack.
How to confirm: Visually inspect all intake ducting between the MAF sensor and the engine for cracks, loose clamps, or disconnections. Pay close attention to the accordion-style sections of the intake tube and all intercooler boot connections on Duramax models. 🎬 Watch: How to perform a boost leak test on your Duramax. A smoke test can be performed to pinpoint hard-to-see leaks.
Typical fix: Replace the cracked boot or intake duct. Tighten any loose clamps. For Duramax models, upgraded silicone intercooler boot kits are a popular and durable repair.
Est. part cost: $30-$150
Faulty MAF Sensor 🟡 Medium Probability
How to confirm: If cleaning the sensor and confirming there are no air leaks does not resolve the code, the sensor itself may have failed. This can be confirmed by monitoring the sensor's output (in grams/second) with a scan tool to see if it responds correctly to changes in engine RPM. A reading that is stuck, erratic, or does not increase smoothly indicates a likely failure.
Typical fix: Replace the Mass Airflow Sensor. It is highly recommended to use a genuine OEM ACDelco/GM part, as some aftermarket sensors are known to cause performance issues or fail to resolve the code.
Est. part cost: $70-$250
Dirty or Clogged Engine Air Filter ⚪ Low Probability This is especially true if an aftermarket oiled filter (like a K&N) is used. Even if the filter appears clean, it can be restrictive enough to cause a P0101. One technician reported a truck's MAF reading at idle was only 21 g/s with a K&N filter, but returned to a normal 33 g/s with a new paper filter.
How to confirm: Remove and inspect the engine air filter. If it is visibly dirty, clogged with debris, or is an oiled aftermarket type, it is a strong suspect.
Typical fix: Replace the engine air filter with a new, quality paper element filter, such as ACDelco.
Est. part cost: $20-$60

Rare But Worth Checking

Faulty EGR Valve: On Duramax engines, an EGR valve that is stuck open or not seating correctly can alter the expected airflow calculations, leading to a P0101 code. This was identified as the root cause in a forum post after other common fixes failed.
Clogged Catalytic Converter or DPF: A restricted exhaust system creates backpressure that can affect the MAF sensor's readings. This is more common on higher-mileage vehicles and is usually accompanied by a severe loss of power.
Wiring or Connector Issue: A damaged wire, loose pin, or corrosion in the MAF sensor's electrical connector can cause an intermittent or failed signal. Wiggle the connector and harness with the engine running to see if it affects the idle.
Ignition Switch Circuit Issues: Manufacturer service bulletin #PIP5729 notes that technicians may find DTC P0101 stored in history alongside P1682 (Ignition 1 Switch Circuit 2), suggesting electrical circuit faults can sometimes trigger airflow codes.

Diagnosis Steps

Read the code with an OBD-II scanner and note any other codes present.
Visually inspect the entire air intake system from the air filter box to the throttle body/turbo inlet. Look for cracks in rubber boots, loose clamps, or disconnected hoses. On Duramax models, pay special attention to the charge air cooler boots.
Inspect the engine air filter. If it's dirty, clogged, or an oiled aftermarket type, replace it with a standard paper filter.
Remove the MAF sensor. Inspect the connector for corrosion or loose pins. Inspect the sensor element for dirt, oil, or debris.
Clean the MAF sensor using only dedicated MAF sensor cleaner spray. Let it air dry completely before reinstalling.
Clear the codes with the scanner, start the engine, and go for a test drive to see if the P0101 code returns.
If the code returns, use a scan tool with live data capability to monitor the MAF sensor reading in grams per second (g/s) at idle and while accelerating. The reading should increase smoothly with engine RPM. A healthy idle reading for a Duramax is around 33 g/s.
If the reading is stuck, erratic, or does not increase properly, and you have confirmed there are no air leaks and a clean, proper air filter is installed, the MAF sensor is likely faulty and should be replaced.

Parts You'll Likely Need

Mass Air Flow Sensor (6.6L LMM Duramax) (OEM #GM: 98002762, ACDelco: 213-3856) — This is the correct sensor for the diesel engine. It is the part to fail if cleaning and checking for leaks doesn't solve the problem. Using the correct OEM part is critical.
Trusted brands: ACDelco (OEM), Bostech
OEM price range: $180-$250
Aftermarket price range: $100-$180
Mass Air Flow Sensor (6.0L Vortec V8) (OEM #GM: 15900023) — This is the correct sensor for the gasoline V8 engine. It is the part to fail if cleaning and checking for leaks doesn't solve the problem.
Trusted brands: ACDelco (OEM)
OEM price range: $150-$220
Aftermarket price range: $70-$150
MAF Sensor Cleaner — Often, the sensor is just dirty and does not need to be replaced. This is the cheapest and most effective first step in diagnosis and repair.
Trusted brands: CRC, WD-40 Specialist
Aftermarket price range: $10-$20
Engine Air Filter — A clogged or improper filter (especially oiled aftermarket types) can restrict airflow and trigger the code. Using a quality OEM paper filter is recommended.
Trusted brands: ACDelco
OEM price range: $30-$50
Aftermarket price range: $20-$40

Related Codes That Often Appear With This One

P0171 — System Too Lean (Bank 1) - Often caused by unmetered air from a vacuum leak that also triggers P0101.
P0174 — System Too Lean (Bank 2) - Often caused by unmetered air from a vacuum leak that also triggers P0101.
P0300 — Random/Multiple Cylinder Misfire - An incorrect air-fuel mixture caused by the MAF issue can lead to misfires.
P0299 / P0172 / P0506 / P1101 — As noted in manufacturer bulletins #PIP5651G and #22-NA-224, these codes frequently appear alongside P0101 when there is a loss of power or hesitation.

Platform-Specific Known Issues

On 6.6L Duramax models, aftermarket oiled air filters (like K&N) are a very common cause of MAF sensor contamination and airflow restriction, leading to P0101. Many owners have solved the code simply by switching back to a stock paper filter.
Cracked charge air cooler (intercooler) boots are a frequent source of unmetered air leaks on the Duramax engine, triggering P0101. The rubber degrades from heat and pressure over time. Upgraded silicone replaceme
Manufacturer service bulletin #PIE0569B highlights that technicians should follow a specific checklist when P0101 is set in conjunction with hesitation or stalling.

Mechanic-Grade Diagnostic Values

MAF Sensor Connector Voltage Check (Key On, Engine Off) — expected: Using a multimeter with the black probe on a chassis ground: one pin should show 12V (battery voltage), one pin should show ~5V (reference voltage from ECM), and one pin should have continuity to ground.. Failure: Missing 12V power, missing 5V reference, or an open ground circuit points to a wiring or ECM issue, not a faulty sensor.
MAF Sensor Live Data Graphing (Scan Tool) — expected: A healthy MAF sensor should produce a smooth, consistent curve on a graph when the engine RPM is increased and decreased.. Failure: A graph that shows sharp drops, spikes, or a flat line when engine speed changes indicates a failing sensor, even if the g/s numbers seem plausible at a glance.

Scan Tool Commands That Help

EFILive: Modify MAF Sensor Parameters (e.g., C0903, C0904) — This is an advanced tuning step used when a P0101 code persists, especially with an aftermarket cold air intake. The stock ECM calibration may be too sensitive for the different airflow characteristics, and adjusting these tables can prevent the code from being triggered when no mechanical fault exists.
OBD-II Scanner / Battery Disconnect: ECU/KAM Reset — After cleaning or replacing the MAF sensor, it's crucial to reset the Engine Control Module's learned fuel trims. This can be done by using a scanner's function to 'Clear Codes' or 'Reset KAM' (Keep Alive Memory), or by disconnecting the negative battery terminal for at least 15 minutes. This forces the ECU to relearn airflow data with the clean/new sensor.

Wiring & Ground Locations

G103 — On the front of the right cylinder head (for the 6.6L Duramax engine).. This is a primary engine ground. A loose or corroded connection here can cause erratic behavior in multiple sensors, including the MAF sensor, leading to incorrect readings and a P0101 code.
MAF Connector Pins — The electrical connector on the MAF sensor itself, located in the intake tube after the air filter box.. The connector provides power, ground, and signal return for the sensor. Technicians test these pins directly to determine if a fault lies in the wiring harness or the sensor itself. A typical LMM harness will have a pink wire for 12V power, a black/white wire for ground, and a yellow wire for the 5V signal.

Real Owner Repair Stories

DuramaxDiesels.com forum user '2004LB7' (LMM Duramax (year not specified)) — Persistent P0101 code that was not resolved by installing a new MAF sensor.
❌ Tried (didn't work) Replacing the MAF sensor with a new one.
✅ What actually fixed it The user discovered a broken wire in the MAF sensor's wiring harness. Repairing the wire resolved the code and the zero g/s reading on the scan tool.
EFILive Forum user 'chevyman2' (2009 GMC Sierra with LMM Duramax, DPF delete, and AFE intake.) — Recurring P0101 code and 'Reduced Engine Power' mode, especially when coming to a stop.
❌ Tried (didn't work) Cleaning the MAF sensor., Replacing the MAF sensor (which only worked for a year).
✅ What actually fixed it The issue was resolved by using EFILive tuning software to change the MAF sensor diagnostic parameters (specifically tables C0903 and C0904). This recalibrated the ECM's expectations to match the aftermarket intake's airflow, preventing the false code.
NHTSA ODI #11424237 — An owner reported that the "Engine Power is Reduced" light and Check Engine light were on due to code P0101. An inspection found the throttle body edge was worn, and replacing the throttle body resolved the issue.

"I Checked Everything" — The Actual Cause

A common scenario where a smoke test reveals no intake leaks is a faulty or sticking EGR valve on the Duramax engine. If the EGR valve is stuck partially open, it allows unmetered exhaust gas to enter the intake manifold. The MAF sensor does not see this extra air/gas volume, creating a discrepancy between what the MAF measures and what the engine's other sensors (like MAP and O2) report as the result. This mismatch triggers a P0101 code without a traditional vacuum or boost leak.

When the Usual Fixes Don't Work

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OEM Part Supersession History

GM 98002762 → ACDelco 213-3856 — Service Part Number
Heads up: ACDelco 213-3856 is the direct GM Original Equipment service replacement for the factory-installed part. They are identical and fully compatible. Be cautious of other aftermarket cross-references that may not perform to OE specifications.

Model Year Variations Within This Range

2007.5-2010: The 2007.5 model year marked the introduction of the LMM Duramax engine, replacing the LBZ. The primary change was the addition of a Diesel Particulate Filter (DPF) and a larger EGR system to meet new emissions standards. While the core engine is similar to the LBZ, this emissions equipment is a key factor in diagnostics, as a clogged DPF can contribute to P0101. The MAF sensor and its related diagnostics remained consistent throughout the LMM's 2007.5-2010 production run.

Diagnostic Flowchart

Start by identifying your engine type (6.6L Duramax or 6.0L Vortec) and checking for aftermarket intake components, as these are the primary triggers for P0101 on the GMT900 platform.

Remove the MAF sensor. Does the sensor filament show signs of oil film or debris contamination?

→ Clean the sensor using dedicated MAF cleaner and replace the filter with a standard ACDelco paper element. Oiled filters are known to drop idle airflow from 33 g/s to 21 g/s on Duramax models, triggering this code.

Inspect the intake ducting. If this is a 6.6L Duramax, check the rubber charge air cooler (intercooler) boots for cracks or oil residue.

→ Replace the cracked boot or intake duct. For Duramax engines, consider upgrading to silicone intercooler boots to prevent future heat-related failures common on the 2007-2010 models.

Using a scan tool, monitor MAF Live Data (g/s) at idle and during acceleration. Does the reading increase smoothly with RPM?

→ Replace the MAF sensor. Use a genuine OEM ACDelco/GM part, as the GMT900 electronics are sensitive to the calibration differences found in budget aftermarket sensors.

Which engine is in your Sierra 2500HD?

Is the truck in 'Reduced Engine Power' (Limp Mode) with black smoke from the tailpipe?

→ Perform a smoke test on the turbo induction system. If no leaks are found, inspect the EGR system for soot buildup which can skew airflow calculations on LMM engines.

→ Check the MAF connector for corrosion or loose pins. If the wiring is intact and the code persists after cleaning, replace the sensor with an ACDelco unit.

→ Inspect the PCV hose and intake manifold gaskets for vacuum leaks. If the engine has high mileage, check for a dirty throttle body causing airflow turbulence at the MAF sensor.

Inspect the intake ducting. If this is a 6.6L Duramax, check the rubber charge air cooler (intercooler) boots for cracks or oil residue.

→ Replace the cracked boot or intake duct. For Duramax engines, consider upgrading to silicone intercooler boots to prevent future heat-related failures common on the 2007-2010 models.

Using a scan tool, monitor MAF Live Data (g/s) at idle and during acceleration. Does the reading increase smoothly with RPM?

→ Replace the MAF sensor. Use a genuine OEM ACDelco/GM part, as the GMT900 electronics are sensitive to the calibration differences found in budget aftermarket sensors.

Which engine is in your Sierra 2500HD?

Is the truck in 'Reduced Engine Power' (Limp Mode) with black smoke from the tailpipe?

→ Perform a smoke test on the turbo induction system. If no leaks are found, inspect the EGR system for soot buildup which can skew airflow calculations on LMM engines.

→ Check the MAF connector for corrosion or loose pins. If the wiring is intact and the code persists after cleaning, replace the sensor with an ACDelco unit.

→ Inspect the PCV hose and intake manifold gaskets for vacuum leaks. If the engine has high mileage, check for a dirty throttle body causing airflow turbulence at the MAF sensor.

Other Known Issues on This Vehicle

Issues unrelated to this code that are worth knowing about as an owner of this generation:

Cracked Dashboard 🟡 Low — Extremely common on GMT900 trucks, often appearing after 5-10 years regardless of mileage or sun exposure. Cracks typically form over the passenger airbag and around the instrument cluster/steering column area. (Ref: No recall was ever issued, but multiple class-action lawsuits were filed regarding the issue.)
Intermediate Steering Shaft Clunk 🟡 Low — Common issue causing a clunk or rattle felt in the steering wheel, especially at low speeds over bumps. It is caused by a lack of grease or wear in the slip joint of the intermediate shaft. (Ref: GM TSB #00-02-35-003N addresses this issue with a procedure to replace the shaft with an updated design.)
Cracked Pistons (6.6L LMM Duramax) 🔴 High — A known weak point of the LMM engine, particularly when power-adding tuners are used, but it has been known to occur on stock engines. The piston typically cracks along the wrist pin.
Leaking Transmission Cooler Lines (6.6L LMM Duramax) 🟠 Medium — A very common failure point where the factory crimps on the flexible portion of the transmission cooler lines fail, causing a significant transmission fluid leak. Often occurs without warning.

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: A used OEM MAF sensor from a reputable salvage yard is a reasonable choice, especially when compared to a new, non-OEM aftermarket part. Since forum wisdom strongly advises against aftermarket sensors for this vehicle, a low-mileage used OEM unit can be a cost-effective and reliable alternative to a new OEM part.

Donor-vehicle mileage cap: roughly under 100000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

Verify the part is a genuine GM or ACDelco unit by checking for markings.
Inspect the connector pins for any signs of corrosion, bending, or damage.
Ensure the plastic housing is not cracked or showing signs of heat damage.
Ask about the donor vehicle's history; avoid parts from flood or fire-damaged trucks.

OEM-only on this vehicle (don't cheap out):

Mass Air Flow (MAF) Sensor - Aftermarket sensors for the LMM Duramax are widely reported on forums to be poorly calibrated, causing persistent P0101 codes or other performance issues.

Aftermarket brands forum-validated for this vehicle:

Bostech - Mentioned as a supplier of OE-quality electronic components for the LMM Duramax.

Brands owners have reported issues with on this vehicle:

Unbranded, low-cost sensors from online marketplaces (e.g., eBay, Amazon).
Oiled air filters (e.g., K&N) - While not a replacement part for the sensor, they are a known cause of MAF contamination and should be avoided on this platform.

Real Owner Stories

Aggregated from forums and TSBs cited above. Mileages and costs reflect what owners reported in those sources.

2009 GMC Sierra 2500HD 6.6L Duramax

Symptoms: The truck had a persistent P0101 code. It had been to four other shops with over $2000 spent on various parts without success. The MAF reading at idle was only 21 g/s.

What fixed it: Replacing a visually clean K&N air filter with a stock ACDelco paper filter, which brought the idle airflow back to 33 g/s.

Cost: $2000-$2100

Source hint: Snap-on Diagnostics Product Forums thread titled 'P0101 code'

2007 Chevrolet Silverado 2500HD (Platform Mate)

Symptoms: Owner cleaned and eventually replaced the MAF sensor and air filter, but the P0101 code would not go away.

What fixed it: A repair shop discovered a faulty EGR valve that was not seating properly.

Source hint: Reddit r/Diesel thread titled 'MAF code P0101 Chev Silverado 2500HD problem. Any ideas?'

GMC Sierra 2500HD 6.6L Duramax LMM

Symptoms: Persistent P0101 code that would not go away even after replacing the MAF sensor.

What fixed it: Removing a K&N filter and checking for air leaks in the boost tubes/intake or issues with the EGR valve.

Source hint: Diesel Place thread titled 'P0101 LMM won't go away'

Frequently Asked Questions

Why is my Duramax 2500HD going into 'reduced engine power' mode with a P0101 code?

On the 6.6L Duramax, P0101 often triggers a 'limp mode' to protect the engine. Common causes include contaminated MAF sensors from oiled aftermarket filters or air leaks in the charge air cooler (intercooler) boots which degrade from heat and pressure. Manufacturer bulletin #22-NA-224 also notes this reduced power concern in relation to P0101.

Can I use any aftermarket MAF sensor to fix the P0101 on my Sierra?

It is highly recommended to use a genuine OEM ACDelco/GM part. Some aftermarket sensors are known to cause performance issues or fail to resolve the P0101 code on these trucks.

I have a K&N filter on my 2008 Sierra 2500HD; could this be causing the P0101 code?

Yes. Oiled aftermarket filters are a very common source of MAF contamination on these trucks. One case showed a K&N filter restricted airflow to 21 g/s at idle, while a stock paper filter restored it to the correct 33 g/s.

How do I check for air leaks on my Duramax intercooler system?

Visually inspect the rubber boots connecting the charge air cooler pipes for cracks or loose clamps. Because these leaks can be hard to see, a smoke test is often used to pinpoint them. Manufacturer bulletin #PIP5651G notes that a disconnected pipe at the throttle body can cause reduced power and a P0101 code.

Is there a specific TSB for the steering clunk I feel while dealing with this MAF issue?

Yes, GM TSB #00-02-35-003N addresses the intermediate steering shaft clunk by replacing the shaft with an updated design.

What is the correct MAF reading for a healthy Duramax at idle?

A healthy idle reading for a 6.6L Duramax engine is approximately 33 grams per second (g/s).

How To Clean a Mass Airflow Sensor (In-depth, detailed version)

Boost leak testing your duramax

MASS AIR FLOW SENSOR - HOW TO KEEP CLEAN by Duramaxtuner

Used OEM Parts in Stock

OEM Fuel Injection Air Flow Meter Assembly for 2007-2017 Cadillac, Chevrolet, General Motors, GMC, & Pontiac

From $39.95

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OEM Mass Air Flow Sensor Assembly for 2009-2014 Cadillac, Chevrolet, General Motors, & GMC

From $52.95

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Article researched & written by

Wrenchy

Go-Parts' AI research assistant. Every article is backed by live web research, verified OEM data, and real technician knowledge — so you get accurate, up-to-date information you can trust.

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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.

Year Coverage

This article covers the OBD-II Code P0101 for:

GMC Sierra 2500HD: 2007200820092010

In this article

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What's Unique About the 2007-2010 GMC Sierra 2500HD
Symptoms You May Notice
Most Likely Causes
Rare But Worth Checking
Diagnosis Steps
Parts You'll Likely Need
Related Codes That Often Appear With This One
Platform-Specific Known Issues
Mechanic-Grade Diagnostic Values
Scan Tool Commands That Help
Wiring & Ground Locations
Real Owner Repair Stories
"I Checked Everything" — The Actual Cause
When the Usual Fixes Don't Work
OEM Part Supersession History
Model Year Variations Within This Range
Diagnostic Flowchart
Other Known Issues on This Vehicle
Used vs. New Parts: Buying Guide for This Vehicle
Real Owner Stories
2009 GMC Sierra 2500HD 6.6L Duramax
2007 Chevrolet Silverado 2500HD (Platform Mate)
GMC Sierra 2500HD 6.6L Duramax LMM
Related OBD-II Codes
Frequently Asked Questions
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P0101 on 2007-2010 GMC Sierra 2500HD: MAF Sensor Problems and Fixes

What's Unique About the 2007-2010 GMC Sierra 2500HD

Symptoms You May Notice