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Prev Professional Automotive Repair Technical Discussions for October 22, 2014
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Open Help Requests for GM
Help Request Answers
1993 Cadillac Fleetwood 5.7L radio VIN: 1G6DW5272P
this vehicle came in as a no-start. the module was bad I replaced it along with some new spark plugs cap and rotor vehicle ran fine. the customer came back a day later after picking up the vehicle and was complained that ever since we replaced the module the r...
2000 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCEK19T3Y
This truck came in with intermitten rough running complaint. First road test yeilded NPF, but after hot soak and restart it would run rough after 1 minuter for less than 30+ seconds. I found that each time after a short hot soak, it would run ok for about 1 mi... Trouble codes: P0306
2003 Chevrolet Silverado 2500 HD 6.6L engine VIN: 1GCHK23173
Connected manual gauge at oil filter housing port, and confirmed instrument cluster readings of 80 psi at idle, and 120 psi at 2000 rpm. Removed oil pressure relief valve from timing cover and checked it for sticking. No sticking found. What else would cause t...
2007 Chevrolet Tahoe LS 5.3L Starts and Stalls, after fueling VIN: 1GNEC03067
Vehicle Starts, runs, and drives Normally, the only isuue is that after turning the vehicle off to fill with fuel it either starts and stalls, or cranks but wont start, no codes present, according to the driver at the last event 15 attempts to start vehicle we...
2003 GMC Yukon XL 1500 Denali 6.0L Engine power VIN: 1GKFK66U63
The traction control system will activate when shifting from first into second gear. This is not consistent. It seems to occur most often under lite throttle, from a stop light most often. Wet or dry roads and we have not had snow yet During this time tractio...
2007 GMC Sierra 2500 HD Classic SLT 6.6L Push Rod VIN: 1GTHK23D17
The vehicle had been to the dealer for an engine noise and excessive smoke. They found that the pushrods on #6 intake and #8 exhaust were broke off at the top cup of the pushrods and the adjuster and locknut on #8 exhaust were loose. Vehicle was fixed and driv...
2003 Saturn Vue 3.0L Cooling Systems VIN: 5GZCZ63B83
Still getting a P0128 thermostat code. This is after the thermostat has been changed 2 times, currently has dealer part. Temps climb slower than normal, 160-170 degrees did creep up to 190. Fans are not running when this happens. Good heat output too. I did ha...

Fixes & Summaries for GM
Fix/Summary Answers
2009 Chevrolet C5500 Kodiak C5E042 6.6L Hesitation VIN: 1GBE5C19X9
First of all thanks for taking time out and giving me some advise and your knowledge concerning this. We ended up dropping the primary fuel tank for inspection. What we found that we were working behind someone and they had removed the filter out of the fuel s... Trouble codes: P0087 (Fuel rail pressure low).
2012 Chevrolet Sonic LS 1.8L Oil Pressure VIN: 1G1JA5SH4C
Thanks for all the replies. Most folks suggested checking the rod and main bearings. All were like new. I ended up calling a local machinist who is a friend of mine. He, in turn called a buddy of his who is a service manager at a GM dealership. He suggested...
2007 Saturn Aura XE 3.5L Cooling fans VIN: 1G8ZS57NX7
It looks like this one is operating normally, fans do not switch off til vehicle is moving. I was not able to find a PID for Cooling Fan command status using 2 different scan tools, but was able to command all fans on and off with Modis. Temp on scanner before...
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