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Prev Professional Automotive Repair Technical Discussions for December 11, 2013
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Open Help Requests for GM
Help Request Answers
2002 Cadillac Seville SLS 4.6L MIL Lamp on VIN: 1G6KS54Y92
Vehicle was in for running rough and misfires. Found bad ign module. Replaced and ran good. Came back a month later with p0420 code. Cat effic. Replaced the cat with bolt on eastman cat. 2 months later same code. Replaced again. Just under 2 months, same code ... Trouble codes: P0420 (Cat effic)
2003 Cadillac CTS 3.2L Heater VIN: 1G6DM57NX3
Hi All: I'm having a difficult time with the heater system on a 2003 Cadillac CTS. I have worked on this car for a few years, so I have history on it. About 2 years ago, it came in for a complaint of no heat on the driver's side. I flushed the core and all wa...
2002 Chevrolet Avalanche 1500 5.3L transfercase VIN: 3GNEK13T72
Scanner code C0327 Tested for power and grounds, No ground at encoder rtn wire (blk/wht); Retested at module no ground. Grounded wire with power probe then system works the main question is should this wire have ground all the time or does the module send gr...
2002 Chevrolet Silverado 2500 HD 6.6L Fuel and Temp gauges VIN: 1GCHK29122
Hey Guys, I have an intermittent one here. I think I have it narrowed down, but I thought I would get a second opinion or two. This Diesel truck has a couple intermittent problems that seem to all be related and seem to have a single cause. The fuel and te...
2005 Chevrolet Silverado 1500 LS 5.3L No Start, MIL Lamp on VIN: 2GCEK13TX5
We are working on a 2005 Silverado 1500. We scanned computer for codes. There was a code for the fan control circuit and random misfire. Checked and found a large amount of moisture in the ECM plug. We cleaned and applied dielectric grease to seal and connecto... Trouble codes: P0480, P0300
2006 Chevrolet Express 3500 6.6L Hesitation, Cuts out, MIL Lamp on, goes into limp mode VIN: 1GCHG35266
intermitent problem, power loss when goin down the highway after check engine light comes on. it wil either set code p0108 or p0234. weare not real familiar with duramax diesels and have never ran into this before. any help would be greatly appreciated Trouble codes: P0234, P0108
1997 Oldsmobile Bravada 4.3L Shift and TCC Solenoids VIN: 1GHDT13W5V
This problem is extremely intermittent. Initially the complaint was key would not turn to LOCK and the truck had no power. I found the ignition switch had failed and replaced it. All was well for about 6000 miles and the customer complained that the SES light ...
2001 Oldsmobile Aurora 3.5L modules VIN: 1G3GR62H51
we have a 01 Old's aurora 3.5L , the customer jump started vehicle since then the dash has erratic lights coming on, the security light comes on and stops the fuel gauge from working, when the ignition key is in the on position we can communicate with all the ...
2006 Pontiac G6 GT 3.5L Timing cover
Need some help from you GM guys. We have a leaking timing cover gasket here and Alldata says R&R time on the timing cover is 3.5 it also says to remove the oil pan. The time to r&r pan is 5.3 . So is the time on the cover way to low or can you leave the pan in...
2007 Saturn Relay-1 3.9L No Heat VIN: 5GZDV53107
Vehicle came in with no heat at all, after replaced water pump & thermostat, heater works good at cruise. But no heat at idle. Also notice that 2 metal pipes along the front valve cover ( these pipes route to the heater core)turn cold when there is no heat. C...

Fixes & Summaries for GM
Fix/Summary Answers
2005 Cadillac STS 4.6L Surge, Stall VIN: 1G6DC67A95
First let me say I forgot to mention that I had tried cleaning the throttle body, with no improvement. The hotter it got, the worse it got. after checking all the grounds, connectors etc., I decided to disconnect the throttle body before the surge and stall wa... Trouble codes: P0365, P0638.
1993 Chevrolet K1500 Cheyenne 5.7L Hesitation, Poor Fuel Economy VIN: 1GCEK14K5P
Well I am sorry for the long delay in closing this post. As I mentioned the customer is doing the work we were trying to help him out... I had many useful tips I tried another alternator. we cleaned all the grounds and re-located the t-stat grounds to an intak...
2010 Chevrolet Silverado 1500 LT 5.3L Oil Mpressure VIN: 3GCRCSE08A
thank you for all the replies. most every one said the screen under the pressure sensor was bad. i ordered one and since i already had the pan off i ordered the secondary pressure relief valve that screws into the pan itself. (apparently the parts guy i was ...
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