Question about 2003 GMC Envoy Xl

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My "GMC Envoy 2003 XL SLT 4.2 liter 6 cylinder",check engine light came on.every morning i start the car to warm-up and it's o.k. but then when i put it on drive"It starts to shake when i step on the brake to stop at red light"and after 15 minutes or so it stops shaking and all is fine.i took it to get scanned and it reads(EVAP SYSTEM MALFUNCTION AND MAP SENSOR ERROR).I use to add gasoline to the car with the car on(CAN IT BE THAT'S WHAT IM DOIN WRONG?)

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First thing to do is to clean the throttle body and throttle plate thoroughly. While performing the cleaning, disconnect the battery for about 30 minutes. This will force the PCM to relearn with a clean throttle body. See if this helps with running and the codes. Also make sure the gas cap is tightened properly.

Posted on Sep 29, 2010

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1 Answer

Proper tire size for 2006 envoy


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MY 2003 GMC ENVOY HAS HAD THE CHECK ENGINE LIGHT ON FOR A WHILE.. DID SPARK PLUS, OIL CHANGE, FILTER. TOOK IT TO ADVANCE AND IT SAID THE CRAM SHAFT SENSOR WAS BAD... BUT IF IT WAS BAD.. DOESNT THAT MAKE...


No your car will still turn on with a bad cam sensor. Bad crank sensor would cause a no start. What code is popping up with the check engine light?

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1 Answer

2002 envoy slt cylinder 6 misfire. How can I fix it


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Why does my2004 gmc envoy xl slt idle high at startup?


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GMC Envoy 2003 SLT only the parking lights and fog lights work. The low beam and high beam don't work. Please help


Well, the problem is that I dont know the reason, you should investigate. There could be issues with lamps (must get new) or electricity problems (must head to auto-service)

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1 Answer

Where is the crankshaft sensor located on a 2003 envoy xl 6 cdylinder


the crankshaft sensor should be located on the GM V6 engine right behind the bottom
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Mar 20, 2011 | 2003 GMC Envoy Xl

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