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Prev Professional Automotive Repair Technical Discussions for August 19, 2013
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Open Help Requests for GM
Help Request Answers
2007 Cadillac DTS 4.6L Misfire, MIL Lamp on VIN: 1G6KD57907
To all valued techs This caddy has a misfire between 1500 to 2000 rpm only on bank 1.It sets P0300 but on the misfire screen on tech2 you can see misfire counter climb on 1 3 5 7 cylinders but you do not feel a misfire. When that happens the fuel trim goes i... Trouble codes: P0300 (multiple misfire bank 1 on this car)
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2000 Chevrolet Suburban 2500 LT 6.0L Alarm VIN: 3GNGK26U2Y
Howdy. I have this Suburban that sets off the alarm every time you unlock the doors with the key. Customer does not have any factory remotes. It doesn't matter if you lock the doors with the electric switch inside or lock them with the key. Every time you try ...
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2000 Chevrolet Express 2500 5.7L Poor Idle Quality VIN: 1GCGG25R8Y
Ok so this Express van is really throwing me for a loop here. The idle is at about 2270 rpms in park. I changed the IAC motor last time and cleaned out the port it sits in. Engine ran fine for the last 3 weeks but now its back again with the same issue of a hi... Trouble codes: P0507 (Idle speed control)
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2001 Chevrolet S10 LS 4.3L Brake Lamps VIN: 1GCDT13W01
This is not a request for help more than telling what I found and fixed. I had a 01 S10 pickup in for on lower brake lamps and the third worked. I found out at A1 connector to the multifunction switch I had no power. So I looked into the vehicle side of the co...
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2003 Chevrolet Monte Carlo SS 3.8L Misfire, MIL Lamp on VIN: 2G1WX12K13
The vehicle came in the computer was scanned code P0300 was the only code in the computer. The customer mentioned that the vehicles check engine light will go on and off. The code before was always the P0300, the customer said that the vehicle has only run rou... Trouble codes: P0300 (Random Misfire)
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2004 Chevrolet Tahoe Z71 5.3L forward shifts, 4kcd/9kcd
Customer came in with bad transmission (slipping, burnt fluid)and said he had another transmission from a wrecked truck. His truck is an '04 Tahoe Z71 and the other transmission is from a 2000 Silverado Z71. I noticed that the electronic box on the shifter stu...
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2007 Chevrolet Trailblazer LT 4.2L timing chain VIN: 1GNDT13S57
how do you release the timing chain tensioner without removing the timing cover,
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2008 Chevrolet C5500 Kodiak C5V042 6.6L shutdown VIN: 1GDE5C39X8
after truck runs for awhile the auto shutdown light comes on which is usually for oil pressure or coolant reasons, and truck shuts down but will restart immediately and run fine for another 30 min or more before shut down. new coolant reservoir and oil pressur...
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2011 Chevrolet Silverado 3500 HD LT 6.6L MIL Lamp on VIN: 1GC5K0C85B
I have this 2011 Chevy 3500 6.6L Dmax that has DEF problems. It kept setting P20EE and P249D. It will set into a power cut down mode and the truck will only run 55 mph. I checked a few things and did a ECM reflash. This seemed to fix the truck... until the nex...
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1992 GMC C2500 Sierra SLE 5.7L aldl VIN: 2GTGC29K7N
hello all having issues with communication have tried two scantools no comm, have tested wires from aldl to pcm all are good except one that goes to the trans then splices and goes to pcm for tcc driver? unplugged the harness at trans still no comm. could that...
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1992 GMC C2500 Sierra SLE 5.7L Poor Idle Quality, Stall VIN: 2GTGC29K7N
hello all this one is driving me to insanity, seems to be running lean, idles rough and stalls at times, can spray some brk cleaner into throttle body and will smooth out, seems worse cold found some vac leaks at t.b but no change, have smoke tested no leaks f...
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2007 Pontiac G6 GTP 3.6L Misfire
I just inherited an 07 G6 GTP from another tech. It has a misfire on all bank 1 cylinders(1,3 and 5). We have checked all the basic things, swapped coils, injectors, spark plugs. Checked compression and leakdown, normal results. Had the upper intake off and no... Trouble codes: P0300 (Misfire on cylinders 13 and 5)
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Fixes & Summaries for GM
Fix/Summary Answers
1998 Chevrolet Corvette 5.7L CD changer VIN: 1G1YY22G8W
We were unable to duplicate the problem. Customer picked up car and has not had problems since. I still feel it was a deck issue but may never know.
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2005 Chevrolet Silverado 2500 HD 6.6L Excessive Emissions, Hesitation, Poor Fuel Economy VIN: 1GCHK232X5
Thank you for your help on this one but after a couple of emails from Brendle, he made it clear that I was in over my head on this one and it needed to go get the ECM flashed to start with. This may not be the issue but I can find no hard faults with any senso... Trouble codes: P0101 (Maf sensor performance), P0299 (Turbo charger under boost), P0401 (Egr flow insifficient), P0404 (Egr position sensor open), P1404 (Egr closed position performance), P0045 (Turbo charger boost control solenoid).
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2006 Saturn Vue 2.2L Interior VIN: 5GZCZ33D76
THANK YOU EVERYONE FOR YOUR REPLIES. THE PROBLEM ENDED UP BEING THAT THE NEW IGNITION SWITCH WAS STICKING AFTER YOU WOULD START THE CAR. IT WOULDNT RETURN BACK TO THE RUN POSITION AFTER YOU LET GO OF THE KEY FROM STARTING IT. WHEN IT WOULD STICK INBETWEEN THOS...
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