my check engine light is on
HAVE IT SCANNED AND GET THE PROBLEM FIXED
If you take it to your local GM dealer they will have the proper scan tools to retrieve the codes that were stored in your computer- this will tell them what needs replacing (some common causes- bad 0xygen sensor, loose gas cap or corroded filler neck, etc.)
go to any of the major parts stores auto zone,napa,carquest,o'reilly's they will normally scan the codes for no charge then post again with any noticed problems
Looking for a Used Sierra 1500 in your area?
CarGurus has 62,311 nationwide Sierra 1500 listings starting at $1,995.
Search GMC Sierra 1500 Questions
GMC Sierra 1500 Experts