reduced engine power
And? Is the check engine light on? Codes?
the check engine light is on but I don't know of any codes
Buy a reader or have someone read them for you. Try your local auto parts store.
Looking for a Used Sierra 2500HD in your area?
CarGurus has 1,042 nationwide Sierra 2500HD listings starting at $3,995.
Search GMC Sierra 2500HD Questions
GMC Sierra 2500HD Experts
Related Models For Sale
Used Cars For Sale