Question about 2003 GMC Sierra
Engine cold or warm smoke on and off
If the smoke is white smoke and you have it after it has run for a while or when you stop at a stop sign or light it is one of two things or possibly both. I have a 2003 GMC 3500 that had the same proble. It turned out to be a combination of Injector being bad and Glowplugs. Injectors are covered up to 200,000 miles but not the glowplugs. I bought 4 glowplugs of the internet for 10.49 a piece AC Delco New. The dealer replaced all 8 injectors and 8 glowplugs. I paind for 4 GP's and the installation 213.00. Truck has more power and NO white smoke you might need to take it to the dealer. The test for the injectors is about 85.00 but well worth the expense
Posted on Feb 24, 2009
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Posted on Jan 02, 2017
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