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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 16, 2007
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Open Help Requests for GM
Help Request Answers
1987 Buick Regal GNX 3.8L Surge, Cuts out VIN: 1G4GJ1172H
hello folks,i have this grand national here when your on accel the boost guage goes up to 15[green] and then beyond into the red the engine then back fires and bucks,it is going into overboost,inspected solenoid operation,repaired any questionable vacuum hoses...
2001 Buick Century Custom 3.1L interior lighting VIN: 2G4WS52J21
Hey GM techs. I've got one here with a short circuit in the interior lights. It started with the door/trunk ajar light in the dash on. I found a blown fuse in the INADV POWER BUS fuse in the dash fuse block. Upon running the flow chart for the codes P1339 and ...
2006 Buick Rendezvous CXL 3.5L restraint syste VIN: 3G5DA03L06
This one comes to us from a local Vo-Tech school. It was involved in a small front end collision. We were told that the driver's side airbag deployed. They repaired the body then they replaced the airbag and both front seatbelts from a 2005 Rendezvous. We clea...
1986 Cadillac DeVille Touring 4.1L vacuum pump VIN: 1G6CD6988G
i have a deville in shop that needs vacuum pump.part has been discontinued by gm,napa,carquest and all my other suppliers.any suggestions would be appreciated.
1991 Chevrolet V3500 Silverado 6.2L late shift VIN: 1GCHV33N3M
hi guys and girls.well the swap from 454 to 6.5 diesel went pretty good.now i have one problem left.i left the original ecm in the truck because i dont feel its necessary to use the diesel ecm(although i do have it).the tps is hooked up and working good,eng te...
1993 Chevrolet C1500 Cheyenne 5.7L Drive shaft VIN: 1GCEC19K2P
Good morning! We have a vibration in the drive line that we could use some help with. This truck will vibrate between 36-45 mph on acceleration or decel. We have replace the U joints and carrier bearing and had the shaft balanced. No difference. With the rear ...
1997 Chevrolet Camaro 5.7L no crank VIN: 2G1FP22P8U
Hello fellow techs, I have this 1997 Camaro that was towed into my shop with a no start problem, I check for power at the starter solenoid and have nothing, so I looked up TSB's on alldata, it lead to the ignition lock cylinder/vats wires shorted or possible b...
2000 Chevrolet Silverado 2500 6.0L idle to high VIN: 1GCGK24UXY
help when shifing gears eng will speed up . when coming to stop idle speed will go up sometime 3500 to 3800 rpm .
2003 Chevrolet Silverado 1500 4.3L Stall VIN: 2GCEC19X33
vehicle came in from another shop.they cahnged ckp.they did not shim it.cusatomer opted to do new improved timming cover amd sensor with shim kit.one week later came back with crank and cam (ckp& cmp ) codes. Trouble codes: P0335
1997 GMC Savana 2500 5.7L Poor Idle Quality VIN: 1GTGG25R5V
hello all. we have a problem with this van. It came in with code po507, idle control system high rpm. We cleaned throttle body, smoke checked for vacuum leaks and installed a new iac motor. the idle speed is about 200 rpm above desired rpm. the code sets in fr... Trouble codes: P0507
1993 Oldsmobile Silhouette 3.8L No Start VIN: 1GHDU06L2P
van towed in from another shop for no start.they replaced crank sensor, ign module and computer.i started checking sys. found ign harness from icm to main harness shorted together. replaced harness with used one.still no start.i have no spark and intermittant ... Trouble codes: 66 (a/c pressure sensor prob.), 67 (cruise switch fault), 68 (cruise command prob), 69 (high pressure switch)
2001 Oldsmobile Intrigue GX 3.5L Cuts out VIN: 1G3WH52HX1
Howdy Folks, This a new fleet customer, the previous service people are gone, no history on this car but based on our dealings with the company, they probably have done nothing on this. It came in for a coolant leak, on the test drive I noticed it kind of bogg...
1994 Pontiac Grand Am SE 2.3L Cuts out VIN: 1G2NE5339R
Problem: Bucks / Surge after cold start up of vehicle or after sitting for 45 minutes or more. Drive along slowly - parking lot speed and the vehicle bucks, loss of power no accel for amoment then it backs again. Possibly once or twice it will do it and then i...
1994 Pontiac Grand Prix SE 3.1L rear brake wear VIN: 1G2WJ52M4R
Posted to get into fix archives, they couldn't help me, so I post here as a help request(& future reference) for others & will close it tomorrow. Gentleman wanted PA inspection performed - failed due to no brake performance evident on rear disc brake discs. It...
1995 Pontiac Firebird Formula 5.7L Hesitation VIN: 2G2FV22P2S
hello fellow techs. i have this vehicle when in the shop or on the road, just off idle , about 1050 rpm, power braking when in the shop ofcourse, the egr will go full 100% and engine will start to run rough. if held there and hose is disconnected on egr and pl...
1996 Pontiac Grand Am SE 2.4L No Start, no spark VIN: 1G2NE12T9T
hello all...i have a 1996 pontiac grand am with a 2.4L and it has a no start problem its getting any spark...i have injector pulse and i have checked with the modis and it says cam and crank sensors are in sync.plug boots,ignition module and spark plugs have b...

Fixes & Summaries for GM
Fix/Summary Answers
1985 Buick Riviera 5.0L Misfire VIN: 1G4E267YXF
thank you, to everyone that replied. many replies pointed to the module. so we decided to replace the distributor and that took care of the problem. i believe it was the module but the entire distributor was not in very good condition so we felt replacement wo...
2005 Cadillac DeVille DHS 4.6L Tire Press Monit Sys VIN: 1G6KE54YX5
Thanks for the replies. It appears that the tire pressure should not go above 38 psi on this car, as stated in GM's TSB, no matter what the side of the tire has on it. It also appears that the TPM cannot be reprogramed on this year Cadillac. One reply did sa...
1994 Chevrolet C3500 5.7L 2nd Only VIN: 1GBJC34K7R
thanks to everyone that help out with info, but the truth is this truck had been purchead by this customer and has had this problem for about 6mo the problem is a code 66 is for the 3-2 downshift solenoide and this is a 4l80 e and it has no such thing as a 3-2...
1994 Chevrolet Cavalier RS 2.2L convertor VIN: 1G1JC5447R
Well, I thank all who replyed to my problem, but as it happens in our business the customer declined any futher repairs. I really wanted to try to resolve the problem for them and offered a discount on the repairs if they would proceed but the car is very rust...
1998 Chevrolet Blazer 4.3L turn signal flasher relay VIN: 1GNDT13WXW
First, let me thank everyone who responded to my problem. Everyone pointed to the multi function switch as being the problem. I partially disassembled the switch to clean the contacts to see if that would help. It did help to a degree but the flasher would sti...
1999 Chevrolet Silverado 1500 5.3L mode VIN: 2GCEK19T3X
The fix for this one was indeed the mode actuator. It is mounted on the left side of the heater case just to the right of the gas pedal. If you remove the lower duct work, it isn't that bad to get to. I did learn one thing in replacing this actuator-when you g...
2000 Chevrolet Tracker 2.0L head gasket VIN: 2CNBE13C4Y
The block was warped just out of spec down one side for a length of about 5'. Its hard to believe just 2 warped valves would cause this. I guess when you have aluminum head & block anything is possible. customer elected to install used long block. Thanks guys ...
2003 Chevrolet Impala 3.4L compressor VIN: 2G1WF52E13
BCM fixed it.How am I suposed to determine if it,s the PCM not receiving the signal or the BCM not sending it?It's done on the data line so theres no signal wire to moniter.Well another learning experience.Thanks to all who responded.
2004 Chevrolet Aveo LS 1.6L timing belt bent valves VIN: KL1TJ52624
I want to thank all. The vehicle is not fixed yet, yet I want to bring all up todate. I will be gone for two weeks and the customer is taking up the case with the selling dealer. (Her daughter purchased the vehicle in San Diego and the mother lives in Auburn, ...
2002 GMC Sierra 1500 4.3L No Start, Stall VIN: 1GTEC14X13
Thank you for your help on the 2002 GMC. The problem with the intermittent no start was found in the BCM. Two years previously, the customer had an after-market alarm system installed. The problem was, they tied into the BCM wiring in two different spots. They...
2000 Oldsmobile Intrigue GL 3.5L Starter VIN: 1GEWH52H5Y
It turned out to be the the Park Neutral switch after all. I left it by-passed over night with no problems so I removed it and found that it had some continuity to ground @ terminal G which suplies circut 1737 a path to ground to close the relay. The resistanc...
2000 Oldsmobile Bravada 4.3L Alarm VIN: 1GHDT13W2Y
As most sugessted the drivers DOOR LATCH was the FIX. I put it on last friday it weds now and the customer has reprted back all is well. Thanks everyone for the help. Rick
1995 Pontiac Grand Am SE 3.1L compressor VIN: 1G2NE15M4S
Thanks to all. The nighmare is over. As many suggested there was a restriction...The brand new AC Delco expansion valve was partially stuck closed...Of course we had refused to believe that a newly installed part could be defective, but there it was...We found...
1998 Pontiac Trans Sport Montana 3.4L Tachometer VIN: 1GMDX03E5W
Thanks for the help on this. Kevin was right on the money. This vehicle has a cam sensor and 2 crank sensors. Apparently the scanner rpm comes from the ignition module which is the crank sensor on the back of the engine. The rpm for the IPC comes from the cam ...
2002 Saturn L200 2.2L Wipers VIN: 1G8JU54F32
Thanks again to all who replied. Most replies suggested that I replace the wiper motor, which I had done, both with a new Saturn unit, as well as an A1 Cardone reman unit. This did not help at all, as previously mentioned. The relay in the underhood fusebox ...
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