GMC Envoy U1000

Also including Oldsmobile, Geo, Hummer, and Saturn (North American brands)
Posts: 1
Joined: Sun Mar 19, 2017 10:17 pm
Vehicle: gmc envoy

GMC Envoy U1000

Postby glorious » Sun Mar 19, 2017 10:21 pm

Code U1000 - Class 2 Communication Failure where to go to fix and an estimated price

Posts: 6584
Joined: Sat Aug 29, 2009 4:24 pm

Re: GMC Envoy U1000

Postby kev2 » Mon Mar 20, 2017 6:30 am

"Where to go to fix"? What shop or where to look for an issue causing this?
A professional repair facility look for ASE certification, union affiliation, and technicians with access to GM for TSB's, trouble trees and wiring information, as well as latest scan tools .

Often added or modified electrical devices will cause these 'communication' issues.
Keep it stock.
Electrical issues are time consuming - consider above statement before starting repairs.

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