Question about 2003 GMC Envoy

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Daughter has a 2003 gmc envoy......issues of stalling and no power were addressed by test at autozone....tps code 220 came up so tps was replaced...truck runs a little better but still had a lack of power/and stalls at highway speeds but runs in city streets..they took back to az and they hooked it up again and now they said its the computer that handles the fuel inj/tps.....wondering why the 1st test did not throw a tc for the computer along with the tps220 trouble code ......and do you think the computer is now the culprit? whats you experience tell you thanks

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It is very rare for the PCM (computer) to fail on these vehicles. The vehicle needs to be scanned by professional scan tool that can monitor the various sensors, fuel pressure, etc. Live data should be recorded when the problem is occurring. Above all, parts should not be changed without proper diagnosis.

Posted on Oct 05, 2010

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Sometimes my when I accelerate when I am stopped at a light my car will stall and cutoff. Other times when I am driving it lose power and shuts off.


IF YOU HAVE NO HARD START PROBLEMS, COLD OR HOT, I WOULD START WITH A PC SCAN FOR CODES, EMISSIONS TEST & FUEL PSI CK. IT COULD BE AS SIMPLE AS A VACUUM LEAK. THAN SCAN PC FOR CODES (TPS, IDLE SPEED SOLINOID. OR RUNS LEAN OR RICH- VAC LEAKS AIR/ GF, INJECTORS FUEL PSI ETC. START WITH THE BASICS. AIR, FUEL & SPARK/ TIMING. GOOD LUCK FRANK M

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1 Answer

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1 Answer

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1 Answer

I have GMC envoy 2003 and the problem is the service engine soon light all the time and I recently changed the camshaft sensor and the lamp still there


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1 Answer

Trouble code po220a


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1 Answer

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If you live near an Autozone, they can diagnose your code for free. This is gm's attempt to protect the engine from worse damage by limiting the power output of the motor...
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1 Answer

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Dec 08, 2008 | GMC Envoy Cars & Trucks

1 Answer

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connect to a diagnostic computer and see what codes it gives you! it might be related to the "throttle control" or TPS which governs the mixture of gas/air etc....it talks to the car computer which controls all these things in the 2003 Envoy. could be the car computer as well....

Sep 08, 2008 | 2003 GMC Envoy

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