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From what I have been reading, it is a faulty ignition switch. Looks like it has happened to several people too.
It can also be the alternator is defective.
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∙ 12y ago
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How can you reset airbag light on 2003 GMC ENVOY?
The airbag light in the 2003 GMC ENVOY can be reset by disconnecting the battery for about 5 minutes. Then reconnect the battery, turn the key to on without starting the vehicle, and pump the gas pedal three times if the light is still on after reconnecting the battery.
Your key is stuck in the ignition in your 2003 GMC Envoy is there a key release button?
My envoy did this also when the battery died. installed new battery and key came out.
How do you turn off engine light in 2003 gmc envoy?
Unplug the battery for five minutes, if that don't work get your truck serviced something is wrong.
What kind of light bulb to i get for the breaklight of my 2003 gmc envoy?
The 2003 GMC Envoy brake light lamp is a 3157. See sources and related links below for more information on bulbs.
Why does your 2003 GMC envoy not crank when you turn the ignition The battery is fully charged?
Check the starter.
What causes the brake light fuse to blow on a gmc 2003 envoy?
Tail light assembly short
How do you replace a back up light bulb in 2003 Envoy?
Just had to do this on my own envoy......You reach under the rear bumber and the light assembly simply unscrews from the housing. You replace the bulb and screw it back in. Takes 5 minutes.
How do you replace the oil pump on a 2003 gmc envoy?
Change oil pump 2003 Gmc Envoy
How many gallons of gas will a 2003 GMC envoy hold?
how many gallons of gass will a 2003 GMC Envoy hold
How do you reset the service engine soon light on 2003 envoy?
You can try unhooking the battery for 5 min. You may also get it scanned find out what the problem is, get the codes cleared, problem fixed & should be o/k why does 1994 Oldsmobile silhouette keep dying
What spark plugs are used for a 2003 gmc envoy?
ac delco spark plugs are type that originally came with 2003 GMC envoy
How many sensors does the brake pads have for a 2003 Nissan altima?
brake light and battery light is on
