Is Your Chevy Express Van Running Rough?
If you’re dealing with a frustrating check engine light, poor fuel mileage, intermittent stalling, or a no-start condition in your 2005-2007 Express 1500, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer for your van’s engine and transmission, its proper function is critical for reliability and performance. When it fails, it can leave you stranded and your business at a standstill. This isn’t just an inconvenience; it’s a direct hit to your productivity.
The Direct-Fit, No-Hassle Solution
Forget about expensive dealership visits and the uncertainty of trying to get a used module programmed. We offer a dependable, straightforward solution. This PCM, compatible with part numbers 89017749, 12589462, and 12602801, is professionally flashed with the latest official GM software updates. We program it specifically to your van’s Vehicle Identification Number (VIN) before we ship it. This ensures it communicates perfectly with your vehicle’s existing systems right out of the box.
From The Shop Floor: “A customer’s 2006 Express 1500 work van came in last week with a maddening issue. It would run fine when cold, but after about 20 minutes of city driving, it would stall at a stoplight and refuse to restart for half an hour. No consistent codes, just pure frustration. We suspected heat-soak was affecting the PCM. After swapping in one of our VIN-programmed modules, the problem was completely gone. The internal driver circuits on these PCMs, especially in the hot engine bay of a van, can develop micro-fractures over time, and this is the classic symptom. It’s a repair I’ve done hundreds of times to get these workhorses back on the road.”
Common Symptoms of a Failing GM PCM:
- โ Persistent Check Engine Light (CEL)
- โ Engine stalling or cutting out, especially when warm
- โ No-start or hard-starting conditions
- โ Noticeable decrease in fuel economy
- โ Harsh or erratic automatic transmission shifting
- โ Communication error codes with a scan tool
Easy Installation for Your 2005-2007 Express 1500 PCM
You can perform this replacement yourself with basic hand tools, saving you time and money. The module is located in the left-hand (driver’s side) rear of the engine compartment.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for the system to fully discharge.
- Locate the PCM: Find the module in the rear driver’s side of the engine bay. It will have several large multi-pin electrical connectors.
- Disconnect Connectors: Carefully release the locking tabs or levers on each electrical harness connector and pull them straight out from the module. Never force them.
- Remove the Old Module: Unbolt the mounting hardware that secures the old PCM to its bracket.
- Install the New Module: Mount your new, pre-programmed PCM in place and tighten the bolts.
- Reconnect and Secure: Firmly plug in all electrical connectors until they click and lock into place. Reconnect the negative battery terminal.
- Final Step: In some cases, a CASE/Crankshaft Variation Relearn procedure may be required with a capable scan tool to prevent a P1336 trouble code. This is a simple procedure for most local repair shops if needed.
Guaranteed Compatibility
This module is a direct replacement for a wide range of GM trucks and vans from this era. Simply provide your VIN at checkout, and we handle the rest, ensuring you receive a part that is 100% ready for your specific vehicle. Restore your van’s reliability and get back to work with confidence.