Question about 2003 GMC Envoy

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How to reset the pcm gmc envoy - 2003 GMC Envoy

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Posted on Jan 02, 2017

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SOURCE: Rough idle

sound slike you may have unplugged or disconnected somethine else or the spark plug you put in is bad or inpropper gap

Posted on Sep 09, 2009

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SOURCE: How long does it take to change out a PCM in a

10 minutes, but the pcm must be programmed.

Posted on Oct 09, 2009

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SOURCE: I have a GMC Envoy

You will have to replace the PCM and it will have to be reprogrammed or your vehicle will not start.You will need to take your vehicle into the dealer and they will replace the PCM and program it in the vehicle.Hope this helps.Good luck.

Posted on Sep 14, 2010

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  • 73 Answers

SOURCE: 2004 GMC envoy has a

replace it cant rest them

Posted on Sep 21, 2010

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1 Answer

My 2003 gmc envoy transmission works in wrecked car but does the same thing when instaled in my envoy, no gears


try changing out the PCM. its responsible for transmission operation. bad PCM means dumb transmission.

Nov 13, 2013 | GMC Envoy Cars & Trucks

1 Answer

What does the code p0483 means for a gmc envoy?


DTC P0483 is set when the difference between the commanded cooling fan speed and actual cooling fan speed is greater than 1,000 RPM.
Reset the comp with the scanner, if it comes up again, then you may need to replace your fan clutch.
Technical Service Bulletin (TSB #04-06-04-090A) says, "The diagnostic calibration in the PCM may allow the DTC P0483 to set improperly." The bulletin directs technicians as follows: "Reprogram the Powertrain Control Module (PCM) with a new service calibration titled, 'New calibration to reduce the potential for setting P0483.'" this will have to be done at the dealership, or by a qualified mechanic.
Good luck.

Aug 19, 2011 | 2004 GMC Envoy

1 Answer

Changed the battery. When riding and slowing down the vehicle cuts off. Doing fine until the battery went dead. 2002 GMC Envoy


WHEN EVER YOU DISCONNECT THE BATTERY.THE PCM WILL LOSE IT MEMORY PCM HAS TO RELEARN IDLE POSITION.SOME TIMES DRIVE AROUND BLOCK FEW TIMES CAR WILL RELEARN TO IDLE.IF NOT GO TO DEALERSHIP.THEY WILL RESET IDLE.USING A T ECH 2 SCANNER.THEY PROBABLY CHARGE YOU $35.00 OR LITTLE MORE.

May 18, 2011 | 2002 GMC Envoy

2 Answers

PO606 in 2004 GMC envoy what does this mean


PCM Processor Fault. A couple of things, check the wiring around the PCM, check for frays in the wiring. There is a Technical Service Bulletin for this problem also, where your pcm would need to be re-flashed (computer update) by the dealer, I believe it's around $100 to do this.

You can also try to disconnect the battery for 30 minutes or so to reset the computer. Some people have just cleared the code by doing this (or with a code reader) and the code never showed back up again.

Mar 19, 2011 | 2004 GMC Envoy

1 Answer

I have a GMC Envoy that is giving me p601 code which I know is a PCM memory problem?? can this computer be fashed to get rid of this problem or do I need to replace the PCM ??


You will have to replace the PCM and it will have to be reprogrammed or your vehicle will not start.You will need to take your vehicle into the dealer and they will replace the PCM and program it in the vehicle.Hope this helps.Good luck.

Sep 14, 2010 | 2004 GMC Envoy

1 Answer

I have a 2004 gmc envoy I need a diagram to show where the engine management & ignition is located, so that I can replace it.


The engine management system is the PCM, it is located on the driver's side of the engine, it has three large connectors. Why do you need to replace the PCM? What kind of problems are experiencing? The PCM rarely goes bad.

Aug 28, 2010 | 2004 GMC Envoy

1 Answer

How long does it take to change out a PCM in a 2004 GMC Envoy?


10 minutes, but the pcm must be programmed.

Oct 09, 2009 | 2004 GMC Envoy

2 Answers

Rough idle


sound slike you may have unplugged or disconnected somethine else or the spark plug you put in is bad or inpropper gap

Sep 03, 2009 | 2002 GMC Envoy

1 Answer

Veh wont start


by looking at the wiring diagram for your truck. the pcm1 fuse only feeds the pcm so most likely it is a grounded wire between the fuse block and pcm. follow the wire harness closely between the two and see if its grounded somewhere. also try disconnecting the pcm and see if the fuse still blows. that would isolate the problem to the wiring. it is highly unlikely that the pcm would cause the problem.

Nov 27, 2008 | 2004 GMC Envoy

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