Get Your GMC Safari Running Right Again
Is your trusty 2004 GMC Safari giving you headaches? Stalling at intersections, refusing to start, or showing a persistent Check Engine Light can be incredibly frustrating, especially when you rely on your van for work or family. These aren’t just annoyances; they’re signs that the brain of your vehicle, the Powertrain Control Module (PCM), may be failing. This replacement 2004 GMC Safari PCM 89017739 is the definitive, reliable solution to get you back on the road with confidence.
Common Symptoms of a Failing PCM & Your Direct Solution
A faulty PCM can cause a wide range of confusing issues that can be difficult to diagnose. If you’re experiencing any of the following, a failing engine computer is the likely culprit:
- No-Start or Hard Starting: The engine cranks but won’t turn over, or takes an unusually long time to start.
- Unexplained Stalling: Your van dies unexpectedly while driving or idling.
- Poor Performance & Fuel Economy: A noticeable drop in power, sluggish acceleration, and more frequent trips to the gas station.
- Erratic Shifting or Transmission Problems: Harsh shifts, getting stuck in gear, or other automatic transmission issues.
- Check Engine Light with Communication Codes: Diagnostic trouble codes like P0601, P0602, or P0606 indicate an internal module failure.
Instead of chasing down endless sensor replacements, address the root cause. We provide a professionally programmed 2004 GMC Safari PCM 89017739, flashed with the latest official GM software specifically for your vehicle’s VIN. This isn’t a generic, one-size-fits-all part; it’s a precise component tailored to restore your van’s original performance and reliability.
Features & Benefits
- ✔ VIN-Specific Programming: We flash the module with your vehicle’s unique VIN, ensuring it communicates perfectly with all other systems right out of the box.
- ✔ Plug & Drive Installation: This unit arrives ready to be installed. In most cases, a simple security relearn procedure is all that’s needed to get you going.
- ✔ Updated GM Software: Your PCM will be loaded with the newest calibrations from General Motors, addressing known bugs and improving performance from the original factory settings.
- ✔ Solves Frustrating Issues: Directly targets and resolves common problems like stalling, no-start conditions, and poor engine performance.
- ✔ Broad GM Compatibility: While perfect for your Safari, this module also fits a wide range of other 2004 GM trucks, vans, and SUVs, confirming its proven reliability.
- ✔ One-Year Protection: This unit is backed by our one-year replacement warranty, giving you confidence in your repair.
An Expert’s Note on GM P59 Controllers
As a technician, I’ve worked on hundreds of vehicles equipped with this specific P59-generation PCM. It’s a workhorse controller used by GM in everything from Corvettes to heavy-duty pickups. Its biggest point of failure often comes from age and heat cycles, leading to internal communication breakdowns that create bizarre, ghost-like electrical problems. Many shops waste hours and hundreds of dollars replacing perfectly good sensors. The real fix is often a properly programmed PCM like this one. Getting a unit that’s correctly flashed to the VIN isn’t just a suggestion—it’s the only way to ensure a lasting, correct repair.
Don’t let a faulty computer keep your dependable van off the road. Ordering this pre-programmed 2004 GMC Safari PCM 89017739 is the most effective step towards a permanent fix and restored peace of mind.
Frequently Asked Questions
Do I need to do anything after I install the PCM?
In most cases, you will need to perform a simple security relearn procedure, also known as a CASE relearn. This can typically be done without special tools and involves a sequence of key turns. Instructions are readily available online for your specific vehicle, or your mechanic can perform it in minutes.
Where do I provide my vehicle’s VIN?
After you complete your purchase, we will contact you for your vehicle’s 17-digit VIN. We cannot program and ship your module without it, so please have it ready. You can find it on your driver’s side dashboard (viewable through the windshield) or on your vehicle’s registration.
Is this a brand new part from the dealer?
This is a quality-tested, genuine GM component that has been meticulously inspected and prepared to ensure it meets or exceeds original factory specifications. It is programmed with the latest official GM software for optimal performance.
How can I be sure my old PCM is the problem?
While a professional diagnosis is always best, common indicators of PCM failure include communication-related trouble codes (like P0601), multiple unrelated error codes appearing at once, and symptoms that persist after replacing related sensors. If your mechanic has ruled out wiring and sensor issues, the PCM is the next logical step.
Will this fix my transmission shifting problems?
In many GM vehicles of this era, the PCM controls both the engine and the transmission. If your shifting problems are electronic in nature (caused by faulty signals or processing), this module is very likely to solve them by restoring proper communication and control.