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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 8, 2020
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Open Help Requests for GM
Help Request Answers
2006 Chevrolet Colorado LT 2.8L MIL Lamp on VIN: 1GCCS14866
This one is killing me (P0171). All issues are at idle, fuel trims are acceptable at cruise and under load -3 / 4 STFT and -3/ 3 LTFT. At idle the fuel trims will show 0 STFT and 5/ 8 LTFT at times which id not bad, but will intermittently go to 0/ 3 STFT ... Trouble codes: P0171 (Lean Bank 1)
2006 Chevrolet Express 2500 4.8L Misfire VIN: 1GCGG25V96
Ok so this gem came in with customer complaining about stalling, test drove van and noticed that it was miss firing so i scanned it and found p0306 misfire on 6, so i checked fuel trim and they were -20 on bank 2, i thought this was strange so swapped coil... Trouble codes: P0300, P0306
2014 Chevrolet Express 1500 4.3L MIL Lamp on VIN: 1GCSGAFX5E
hey guys van came in with above codes found plugs severly worn replaced plugs and wires and downstream o2 couple weeks later codes returned no history or present misfire counters fuel trims are in range only thing sticks out is the b2s2 o2 still remains la... Trouble codes: P219B, P219B
2016 Chevrolet Express 4500 6.6L Heater VIN: 1GB6GUCL4G
This ambulance has perfect heat above idle. 155 degrees. When it idles the temp goes to 75 degrees. The heater hoses are 75 degrees on the inlet and outlet as well as on front and rear heaters. The engine is maintaining operating temperature. Its like the ...

Fixes & Summaries for GM
Fix/Summary Answers
2000 GMC Sonoma SL 4.3L No Start VIN: 1GTCS19W7Y
Yes it is fixed. took off the pressure gauge yesterday morning by popping the quick connect instead of unscrewing it. what gushed out puddled up just like water-because it was water. took a fuel sample and it was 95% water and 5% fuel. somebody sabotaged this ...
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