Go-Parts
Cart 0
Your cart is empty
Add an item to see it appear here.

Fuel Injection Throttle Body for 2005 Buick, Chevrolet, GMC, Isuzu, & Saab

Only 2 left in stock
Price today
$123.95
$3 core refund
YOUR NET COST
$120.95
after returning your old part
✓ Prepaid core return label
30-DayReturns
6-monthWarranty
100%Money-Back

Professionally inspected and tested.

Odometer 144,500 miles at removal

Product Notes Read before buying

This is a used part for vehicles with the 5.3L 8-cylinder engine.

This throttle body is for vehicles equipped with a 5.3L or 6.0L V8 engine only. It will not fit models with the 4.2L 6-cylinder engine.

Why Buy Used OEM Parts?

Checked & Tested

We check and test every used part before we sell it. It may show some wear, but it works and is ready to install.

Original Equipment

This is the same part your vehicle came with from the factory. It fits and works just like the original — because it is one.

Works Like New

A few marks on the outside don't change what's inside. The part works the way it should.

Big Savings

Pay 50–80% less than buying new. Same factory part, much lower price.

Wrenchy the Robot
Not sure? Ask WrenchyYour Parts Assistant.

Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.

Vehicle Fitment Guide

This part fits the following vehicles:

Buick 1 model(tapclick to expand)(tapclick to hide)
Rainier 2005 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL
Body Style Years Engine Attributes
CXL SUV 2005 V8 5.3L AWD/RWD | Automatic
CXL Plus SUV 2005 V8 5.3L AWD/RWD | Automatic
Applies to every configuration above: Hollander: RAINIER 05 Throttle Valve Assembly; 5.3L; Hollander: RAINIER 05 Throttle Valve Assembly; 5.3L; engine_size: include 5.3L; engine_size: include 6.0L; engine_config: include V8
Chevrolet 2 models(tapclick to expand)(tapclick to hide)
SSR 2005 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL
Body Style Years Engine Attributes
Base Convertible 2005 V8 6.0L RWD | Automatic & Manual | Hollander: SSR 05 Throttle Valve Assembly;; Hollander: SSR 05 Throttle Valve Assembly;; engine_size: include 5.3L; engine_size: include 6.0L; engine_config: include V8
Trailblazer EXT 2005 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL
Body Style Years Engine Attributes
LS SUV 2005 V8 5.3L RWD/4WD | Automatic
LT SUV 2005 V8 5.3L RWD/4WD | Automatic
Applies to every configuration above: Hollander: TRAILBLAZER EXT 05 Throttle Valve Assembly; 5.3L; Hollander: TRAILBLAZER EXT 05 Throttle Valve Assembly; 5.3L; engine_size: include 5.3L; engine_size: include 6.0L; engine_config: include V8
GMC 3 models(tapclick to expand)(tapclick to hide)
Envoy 2005 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL
Body Style Years Engine Attributes
Denali SUV 2005 V8 5.3L RWD/4WD | Automatic | Hollander: ENVOY 05 Throttle Valve Assembly; 5.3L (Denali); Hollander: ENVOY 05 Throttle Valve Assembly; 5.3L (Denali); engine_size: include 5.3L; engine_size: include 6.0L; engine_config: include V8
Envoy XL 2005 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL
Body Style Years Engine Attributes
Denali SUV 2005 V8 5.3L RWD/4WD | Automatic
SLE SUV 2005 V8 5.3L RWD/4WD | Automatic
SLT SUV 2005 V8 5.3L RWD/4WD | Automatic
Applies to every configuration above: Hollander: ENVOY XL 05 Throttle Valve Assembly; 5.3L; Hollander: ENVOY XL 05 Throttle Valve Assembly; 5.3L; engine_size: include 5.3L; engine_size: include 6.0L; engine_config: include V8
Envoy XUV 2005 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL
Body Style Years Engine Attributes
SLE SUV 2005 V8 5.3L RWD/4WD | Automatic
SLT SUV 2005 V8 5.3L RWD/4WD | Automatic
Applies to every configuration above: Hollander: ENVOY XUV 05 Throttle Valve Assembly; 5.3L; Hollander: ENVOY XUV 05 Throttle Valve Assembly; 5.3L; engine_size: include 5.3L; engine_size: include 6.0L; engine_config: include V8
Isuzu 1 model(tapclick to expand)(tapclick to hide)
Ascender 2005 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL
Body Style Years Engine Attributes
Limited SUV 2005 V8 5.3L RWD/4WD | Automatic
LS SUV 2005 V8 5.3L RWD/4WD | Automatic
S SUV 2005 V8 5.3L RWD/4WD | Automatic
Applies to every configuration above: Hollander: ISUZU ASCENDER 05 Throttle Valve Assembly; 5.3L; Hollander: ISUZU ASCENDER 05 Throttle Valve Assembly; 5.3L; engine_size: include 5.3L; engine_size: include 6.0L; engine_config: include V8
Saab 1 model(tapclick to expand)(tapclick to hide)
9-7x 2005 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL
Body Style Years Engine Attributes
Arc SUV 2005 V8 5.3L AWD | Automatic | Hollander: SAAB 9-7X 05 Throttle Valve Assembly; 8 cylinder; Hollander: SAAB 9-7X 05 Throttle Valve Assembly; 8 cylinder; engine_size: include 5.3L; engine_size: include 6.0L; engine_config: include V8
Verify before ordering — please confirm your vehicle's year, make, model and sub-model specifications before placing your order. If anything is unclear, our customer service team is available to help.

Policies, in plain English.

Shipping & Handling

  • Standard shipping: 3-7 business days via UPS Ground
  • Parts are carefully packaged to prevent damage during transit

6-Month Warranty

All used parts include a 6-month warranty from the date of purchase.

  • If your part fails within 6 months, we will send a replacement
  • Refunds are only issued if we cannot provide a suitable replacement
  • Warranty covers defects — not installation errors, misuse, or damage after installation

Note: Warranty is for replacement, not refund. A part failing on day 80? We'll replace it. But the return window for refunds is 30 days.

Returns (30 Days)

We accept returns within 30 days of delivery for this part.

  • Defective parts: We will replace the part or issue a refund at our discretion
  • Electronic parts: Must be returned with the sealed inspection bag unopened. The clear bag allows full visual inspection before opening. Once opened, electronic parts can only be exchanged for a replacement if defective — no refunds
  • Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
  • Return shipping: We cover return shipping as part of our 100% money-back guarantee
  • Parts must be returned in original packaging and unmodified condition
  • Poorly packaged returns that arrive damaged will not be credited

Damaged in Shipping?

If your part arrives damaged:

  • Stop immediately — do not install the part
  • Keep all original packaging and boxes
  • Take clear photos of the damage and packaging
  • Contact us within 48 hours of delivery

We will handle the carrier claim. You are not responsible for shipping damage — we just need your help documenting it.

Order Cancellation

Orders can be cancelled before shipment for a full refund. Once shipped, cancellations follow our return policy.

Expert Guides

2005 GM V8 Throttle Body Failure: Fixing 'Reduced Engine Power' on Trailblazer, Envoy, 9-7X, SSR & More

This guide covers the common causes, symptoms, and repair procedures for the electronic throttle body on 2005 GM V8-powered SUVs and trucks, focusing on the notorious 'Reduced Engine Power' warning.

Read Full Guide →

Related Trouble Codes (OBD-II)

34 matching guides

If your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.

P0106
MAP Sensor and Throttle Body Guide
2002-2009 Chevrolet TrailBlazer
P0222
Causes, Fixes, and Throttle Issues
2004-2007 Buick Rainier
P0300
Random Misfire Causes and Fixes
2003-2008 Isuzu ASCENDER
P1515
Reduced Power Causes and Fixes
2002-2009 GMC Envoy
P1515
Reduced Power Causes and Fixes
2002-2009 Chevrolet TrailBlazer
P1516
Reduced Power Causes and Fixes
2005-2009 Chevrolet TRAILBLAZER
P1516
Reduced Power Causes and Fixes
2003-2008 Isuzu Ascender
P1516
Causes and Fixes for Reduced Engine Power
2002-2009 GMC Envoy
P1516
Reduced Engine Power Causes and Fixes
2004-2007 Buick Rainier
P1516
Causes and Fixes for Reduced Power
2002-2009 Chevrolet Trailblazer
P1516
Causes and Fixes for Reduced Engine Power
2005-2009 Saab 9-7x
P1516
Reduced Power Causes and Fixes
2003-2009 Chevrolet Trailblazer
↑ A single part can trigger multiple related trouble codes. Each guide is vehicle- and code-specific.

Miscellaneous Information

OEM Part Numbers:
GM: 12572658, 12580760, 12679524
Standard Motor Products: S20008

Fits Years: 2005

Why Millions Choose Go-Parts

Your Go-To Place
for auto parts.

In operation since 2007. Trusted by over a million DIYers, mechanics, and body shops across all 50 states.

100%
Money-Back Guarantee

Shop With Total Confidence

Not happy with what arrived? 30-day returns, no-questions-asked refund. We make it right.

19
Years of Excellence

Trusted Since 2007

Nearly two decades of shipping parts to professionals & enthusiasts.

6MO
Warranty

Backed For The Long Haul

This part ships with a 6-month warranty. If it doesn't fit or stops working, we replace or refund — no hassle.

What buyers are saying.

★★★★★ 4.9 1,451 verified reviews

Racing Partner Videos

Added to cart · Part