OEM Transmission Control Module for 2004-2005 Buick, Chevrolet, GMC, Pontiac, & Saturn - Left (Driver)
Condition: Excellent (A) — like new, minimal to no wear
Professionally inspected and tested.
Product Notes Read before buying
This module must be programmed with your vehicle's specific VIN (Vehicle Identification Number) to ensure proper function. Failure to program the module will result in shifting issues or a no-start condition.
1 Other Matching Unit Available
Same part, different stock options.
Why Buy Used OEM Parts?
We check and test every used part before we sell it. It may show some wear, but it works and is ready to install.
This is the same part your vehicle came with from the factory. It fits and works just like the original — because it is one.
A few marks on the outside don't change what's inside. The part works the way it should.
Pay 50–80% less than buying new. Same factory part, much lower price.
Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.
Vehicle Fitment Guide
This part fits the following vehicles:
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| CX | Sedan | 2005 | V6 3.8L | FWD | Automatic |
| CXL | Sedan | 2005 | V6 3.8L | FWD | Automatic |
| CXS | Sedan | 2005 | V6 3.6L | FWD | Automatic |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| CXS | Sedan | 2005 | V6 3.6L | FWD | Automatic | Hollander: LACROSSE 05 Transmission; (3.6L), (lower air cleaner housing); transmission: include Automatic |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| CXL | SUV | 2005 | L6 4.2L | AWD/RWD | Automatic |
| CXL | SUV | 2005 | V8 5.3L | AWD/RWD | Automatic |
| CXL Plus | SUV | 2005 | L6 4.2L | AWD/RWD | Automatic |
| CXL Plus | SUV | 2005 | V8 5.3L | AWD/RWD | Automatic |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| CXL | SUV | 2004 | V6 3.6L | AWD/FWD | Automatic |
| Ultra | SUV | 2004 - 2005 | V6 3.6L | AWD | Automatic |
| CXL Plus | SUV | 2005 | V6 3.6L | AWD/FWD | Automatic |
| Ultra | SUV | 2005 | V6 3.6L | FWD | Automatic |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | Coupe | 2005 | L4 2.2L | FWD | Automatic |
| Base | Sedan | 2005 | L4 2.2L | FWD | Automatic |
| LS | Coupe | 2005 | L4 2.2L | FWD | Automatic |
| LS | Sedan | 2005 | L4 2.2L | FWD | Automatic |
| LT | Coupe | 2005 | L4 2.2L | FWD | Automatic |
| LT | Sedan | 2005 | L4 2.2L | FWD | Automatic |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | Convertible | 2005 | V8 6.0L | RWD | Automatic |
| Base | Hatchback | 2005 | V8 6.0L | RWD | Automatic |
| 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 |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Denali | SUV | 2005 | V8 5.3L | RWD/4WD | Automatic | Hollander: ENVOY 05 Transmission; (LH engine compartment), (8 cylinder); transmission: include Automatic |
| 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 |
| 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 |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | Coupe | 2005 | V8 6.0L | RWD | Automatic | Hollander: GTO 05 Transmission;; transmission: include Automatic |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | Sedan | 2005 | V6 3.8L | FWD | Automatic |
| GT | Sedan | 2005 | V6 3.8L | FWD | Automatic |
| GTP | Sedan | 2005 | V6 3.8L Supercharged | FWD | Automatic |
| GXP | Sedan | 2005 | V8 5.3L | FWD | Automatic |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | Coupe | 2005 | L4 2.2L | FWD | Automatic |
| Base | Sedan | 2005 | L4 2.2L | FWD | Automatic |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 1 | Sedan | 2005 | L4 2.2L | FWD | Automatic |
| 2 | Coupe | 2005 | L4 2.2L | FWD | Automatic |
| 2 | Sedan | 2005 | L4 2.2L | FWD | Automatic |
| 3 | Coupe | 2005 | L4 2.2L | FWD | Automatic |
| 3 | Sedan | 2005 | L4 2.2L | FWD | Automatic |
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
2004-2005 GM T42 Transmission Control Module: Solving Harsh Shifting & Limp Mode
This guide covers the common T42 Transmission Control Module (TCM) failures causing erratic shifting in the 2005 Buick LaCrosse, Chevrolet Corvette, GMC Envoy, Pontiac Grand Prix, Chevrolet Cobalt, and more.
Read Full Guide →Related Trouble Codes (OBD-II)
1 matching guideIf 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.
Miscellaneous Information
OEM Part Numbers:
GM: 12592124, 24223112, 24226863, 24231673, 24233595, 24234180, 24234189, 24234567, 24239427
Other: FP, MC, MX, PK, QE, YBWW, YDFC, YDFD, YDLT, YJHY, YKTB, YKTF
Fits Years: 2004 2005
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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.
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