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Prev Professional Automotive Repair Technical Discussions for March 18, 2015
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Open Help Requests for GM
Help Request Answers
1998 Chevrolet K1500 Silverado 5.7L abs VIN: 1GCEK19M8W
We replaced literally every single part in the brake system , master cyl., anti lock module , pads , rotors ,whl. cyls. etc.etc. and as soon as you start the vehicle we lose the brake pedal , but when the truck is not running it has a good pedal , we bleed the...
2002 Chevrolet Suburban 1500 LT 5.3L ABS System VIN: 1GNFK16Z92
Ok guys I know there are alot of front sensor clearance issues, I have checked, rechecked and cleaned all 3 sensors. I know the next step is to scope everything, but I'm leaning towards it not being a wheel speed issue. If there was a problem with the VSS, the...
2003 Chevrolet Silverado 2500 6.0L Slow starting VIN: 1GCHK29U53
Truck will not do it every time,runs good no codes,will always start just cranks longer at times,seems to do it more often in warmer temps,teck two shows evverything is ok
2005 Chevrolet Express 3500 6.0L Electrical VIN: 1GCHG39U15
We have a 2005 GMC G3500 with an intermittant problem. Whenever it wants, it will not shut off. New battery periodically is completely dead. With key out of ignition, the service engine light will be on. Scan tool will be on when this happens. Start van and al...
2007 Chevrolet Silverado 1500 Classic LS 4.3L engine VIN: 1GCEC19X77
Ok, feel like an idiot here, guys, but Ive got to be missing something. Installed a new jasper engine in this truck, and it refuses to start. Timing is set, timing light verifies #1 plug sparking at 0 degrees TDC, by the upper timing mark. It seems to be getti...
2007 Chevrolet Suburban 2500 LT 6.0L Door Locks VIN: 3GNGK26K17
Thanks in advance for any information that might help us solve this problem. This Suburban is a news van with various transmitting and receiving components in it. Vehicle also has an Auragen Generator on it to support all the electrical equipment that it runs....
2012 Chevrolet Sonic LT 1.4L Surge, MIL Lamp on VIN: 1G1JD6SB3C
Vehicle brought in for check engine light. After road test found an uneven idle and a slight surge on light acceleration. Ran flow chart and didn't lead to a concrete fix. Acts almost like a vacuum leak but didn't turn up any problems when check for leaks. Any... Trouble codes: P0171 (System too lean), P1101 (Intake air flow system performance)
2008 GMC Acadia SLE 3.6L Rack and pinion VIN: 1GKER13748
Hey guy's, I've got a 2008 Saturn Outlook coming in next week for a new rack n pinion. It's says 7hrs. in the labor guide, I'm wondering if there are any short cuts or words of wisdom on performing this task. Thanks for taking the time to respond.
2009 Pontiac G6 GT 3.9L bolt in the block VIN: 1G2ZH36129
Anyone ever seen oil leaking out of the AC compressor bracket bolt near the oil filter adapter? The bolt looks like it screws into the block near an oil galley. Does it require sealant or could the block be cracked near the bolt? We have not disassembled it...

Fixes & Summaries for GM
Fix/Summary Answers
2007 Cadillac Escalade 6.2L Transmission VIN: 1GYFK63837
1986 Chevrolet C20 Silverado 5.7L MIL Lamp on
Thanks everyone for your response. This system only monitors air injection. I found a wiring diagram and system tests buried in alldata. I found both air pump electric solenoids open. Hoping to find some new ones, but its looking fairly grim. Will update this ...
2006 Chevrolet Monte Carlo LT 3.9L Surge, Stall VIN: 2G1WK15156
Thanks to all that replied. it was the Camshaft solenoid actuator.
2008 GMC Acadia SLT 3.6L Poor Idle Quality VIN: 1GKEV23718
We will be purchasing a used engine and transmission assembly from a yard. This is not a regular customer of ours and he has been probably dealing with problems for some time. It did not help that he waited almost 12000 miles to perform an oil change and that... Trouble codes: P0741, P0011 (Intake Camshaft Position Sensor Sys Performance Bank 1), P0016, P0017 (Crankshaft Position Exhaust Correlation Bank1 Test Failed), P0018 (CKP Intake Camshaft Position Correlation Bank 2 Test Failed), P0019 (CKP Intake Camshaft Position Correlation Bank 2 Test Failed).
1995 Pontiac Firebird Formula 5.7L Misfire VIN: 2G2VF22P2S
Sorry about the late reply. This vehicle is 40 miles away (80 miles round trip)at a tire shop. Next time I'm that way I'm going to replace the wire to the PCM. Again the miss is on #2 cyl. When I swap injector connector from #2 to #4 the misfire moves to #4 an... Trouble codes: 18 (Injector circuit).
2007 Pontiac Torrent 3.4L lifters VIN: 2CKDL63FX7
Hey guys The Torrent is fixed. I actually changed oil twice. First time to see if I could verify good oil pressure, then the second time after I replaced head gaskets. The customer didn't want to mess with lifters so I left them alone. Noise seemed to disappea...
2007 Saturn Vue Green Line 2.4L Mechanical VIN: 5GZCZ33ZX7
Compression test was bad, 60-80psi, leakdown test was even worst, no cylinder would hold more than 70% for more than 5 seconds. Told customer chain most likely jumped and engine is toast. Customer decided to junk car.
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