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Prev Professional Automotive Repair Technical Discussions for January 16, 2013
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Open Help Requests for GM
Help Request Answers
1992 Buick Park Avenue 3.8L Stall VIN: 1G4CW53L3N
came in to shop with a complaint of the car intermittently stalling, pulled codes 34 and 41. checked the wires to the cam sensor, ohm was great, no bare wires. checked ignition module, perfect, changed pcm with known good one.cleared light and restarted. the l... Trouble codes: 41 (no cam reference signal), 34 (mass air flow sensor failure)
1998 Buick Park Avenue 3.8L Misfire, MIL Lamp on VIN: 1G4CW52K9W
I have an old buick that has a cylinder 1 and 4 miis in the scan tool data, no other cylinders missing the miss starts at 2000rpm you can almost feel it. I have an old snap on vantage with the kv module and i do not see any difference from on plug wire to the ... Trouble codes: P0300
2000 Chevrolet Suburban 1500 LT 5.3L PRNDL Indicator VIN: 3GNFK16T6Y
I would like thank everyone ahead of time for any help. This vehicle came in with transmission slipping. Replaced transmission with remanufactured one from Autozone, also changed Park/neutral safety switch at same time. Transmission works fine but as you move ...
2000 Chevrolet Venture 3.4L Stall VIN: 1GNDU03EXY
have done tons of work on van. new module,coils crank shaft sensor map, mass air flow sensor, upper and lower intake gaket.plug, wires. this thing bogs and then dies, coughs. no codes other then inter. u1040. no misfires. put spark tester on it after it dies, ... Trouble codes: U1040
2000 Chevrolet Corvette 5.7L Hesitation, Cuts out VIN: 1G1YY22G1Y
Hello everyone. I have a corvette here that is acting very intermittantly strange. Vehicle came in about 6 months ago with a steering column lockout message and would die after reaching 2 mph. I installed a LMC5 module from compliance parts in southern califor...
2001 Chevrolet Suburban 1500 LS 5.3L Communication VIN: 1GNEC16T51
This vehicle is driving us crazy. It came in because they say it will intermittently shut off. We tried to check for codes, but We have no communication with any modules. We have followed the alldata chart and we cannot come up to a conclusion. We have checked...
2007 Chevrolet Uplander LS 3.9L power steering pump VIN: 1GNDV23W07
Thanks in advance folks, This car came in with the customer complaining of power steering whine, found foamy fluid and a leaking return line. we replaced the return line and got rid of the foamy fluid, but the pump still made noise. Put on another delco pump, ...
2007 Chevrolet Cobalt LT 2.2L monitors VIN: 1G1AL55F37
Vehicle brought from indy oil change facility. Monitors are not complete, 2 systems, EVAP and 2nd syst(AIR). Failed state inspection. While checking present monitors I noticed that none of the monitors were complete. Figured indy cleared computer. Waited for c...
1996 Geo Tracker 1.6L Poor Idle Quality VIN: 2CNBJ1865T
Vehicle was towed in . Had to crank several times to start,had low fuel pressure. Pulled tank to replace pump, but found hole in hose to pump .replaced hose.vehicle hadn't been driven for 1 1/2 yrs . Drained old gas added new gas installed tank. Starts on firs...
2005 GMC Sierra 2500 HD SLE 6.0L Mechanical VIN: 1GTHK23U35
does any one have info on the way the cam behind mode door motor goes t,the plastic piece feel off and i cant seem to see how it goes back on Thanks Steve
2007 GMC W4500 Forward W4S042 5.2L Stall, power loss VIN: J8DC4B1677
Hi, I have a bit of a stumper on this little Diesel. It runs great and drives great for the most part but if you take it on the freeway, it looses power and the water in fuel light comes on after about 10 or so miles. Pull over, shut it off and wait about 30 s...
1999 Pontiac Firebird Formula 5.7L Starting VIN: 2G2FV22G7X
to all GM gurus. got this firebird with a no start issue. did some diagnosis and found the starter relay not grounding. applied my own ground to stater relay and it fired up. am thinking the BCM is faulty. the other thing is that the instrument cluster is inop...
2006 Pontiac Grand Prix GT 3.8L engine VIN: 2G2WT55226
Customer states that the car will die at times and not restart. Sometimes while driving down the road or at a light. Only had it happen to me once, let it set a minuit and it restarted. Didn't have the scanner hooked up at the time to see what happened. Any th...
2008 Pontiac Montana SV6 3.9L Input Speed Sensor VIN: 1GMDV03108
This van is from a tranny shop they rebuilt the tranny and now is getting a p0717 code for no input speed sensor. Have put new sensor in and used tcm. Test drive with labscope on sensor and looking at scanner data for input sensor rpm, in park and neutral both...
2004 Saturn Ion-2 2.2L Shifter VIN: 1G8AZ52F44
Te shifter in this car is a piece of crap. I can not get it to go in to second gear and trouble with first. When i look at this shifter its made out of plastic and truthfully i am not sure were to start with it. replace the cables or the whole shifter and cabl...
2007 Saturn Ion-3 2.2L MIL Lamp on VIN: 1G8AL55F67
Does anyone have a good fix for this?

Fixes & Summaries for GM
Fix/Summary Answers
2004 Buick Rainier CXL 4.2L Front Axle VIN: 5GADT13S94
Sorry for the long wait, but things do not move so quickly in Western Montana. I took the right side housing off the oil pand and found the axle and the sleeve ground off. Replace these and all the bearings and seals and put it back together with a lot of gr...
2000 Chevrolet Express 3500 LS 5.7L MIL Lamp on VIN: 1GBJG31R7Y
Thank you guys for all the great responses. The vehicle is fixed! It wound up being a faulty injector on bank one. I think most of you were on the right track with either a restricted exhaust or too much air getting in that side of the engine, which the faulty... Trouble codes: P0171 (System lean bank one).
2008 GMC Acadia SLT 3.6L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1GKEV33798
Hey everyone, thanks for all the replies back, and sure enough, it was in the harness that goes right into the main junction box on passenger side. loose connector. repaired connector and now problem is gonzo! thanks dave Trouble codes: P0202 (cylinder 2 - injector circuit problem), P0204 (cylinder 4 - injector circuit problem), P0206 (cylinder 6 - injector circuit problem), P0300 (Engine misfire detected).
2003 Saturn Vue 2.2L MIL Lamp on VIN: 5GZCZ23D73
The terminal in the pcm coonector was bad and making intermittant contact. Can only asume that someone had been trying to diagnois the problem and spread the pin apart. We found it very loose once removed from the wiring harness at the J2 connector. Replaced p... Trouble codes: P0327.
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