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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 12, 2018
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Open Help Requests for GM
Help Request Answers
2009 Cadillac DTS 4.6L MIL Lamp on VIN: 1G6KD57Y09
Vehicle was in last January for same problem, P0411 replaced combination valve & secondary air injection pump, has been ok for a year. We had a real cold spell in the single to negative 17 degrees for 2 weeks when this problem occurred again. Customer driv... Trouble codes: P0411 (secondary air injection incorrect flow detected)
1999 GMC W4500 Forward W4S042 5.7L charging system wiring VIN: 4KDC4B1R6X
capable of 14.2 volts with blue and white wire jumped to 12 volt supply and will carry all loads on truck while supplied with 12 volts I would like help with a wiring diagram including charge relay and fuse (in dash)
2009 Hummer H3 3.7L Unknown VIN: 5GTEN13EX9
this truck has a vibration in the engine and travels true the whole truck when it's in drive. thanks for any input. john

Fixes & Summaries for GM
Fix/Summary Answers
2011 Chevrolet Traverse LT 3.6L MIL Lamp on VIN: 1GNKVGED2B
An Acadia with the same motor came in while the problem vehicle was still here. I was able to check timing on the Acadia with a scope. In comparison with the Traverse the Traverse was out of time. The customer did not want us to dig any further as they are jus... Trouble codes: P0017 (Ckp exhaust cmp correlation bank 1), P0008 (Engine position performance).
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