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Prev Professional Automotive Repair Technical Discussions for February 19, 2007
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Open Help Requests for GM
Help Request Answers
1995 Buick Park Avenue 3.8L Theft System VIN: 1G4CW524SH
Car has an intermittent problem with the anti theft system. the alarm goes off when ever it feels like it.Car has been to the dealer.Dealer found no problems with it.At the moment the car is not acting up. This is a pass key II system. The Car is Also OBDII. T...
1990 Cadillac DeVille 4.5L MIL Lamp on VIN: 1G6CD5338L
This Cadillac seems to start and run good in the morning no matter how cold it is. It sometimes be hard starting after it was shut off for a couple hours. Changed the coolant temp sensor and that seemed to fix that problem. Now after that repair a couple days ...
1995 Cadillac DeVille 4.9L abs VIN: 1G6KD52B9S
Hello to everyone. I have this Deville that I can not figure out what is wrong. I have a abs code 37 lr sensor continuity fault. I have went trough the diag chert in alldata and dont want to just replace parts like the end of the flow chart sugests. I have ohm...
2003 Cadillac CTS 3.2L Poor Idle Quality, Hesitation, Surge VIN: 1G6DM57N63
This is my sisters car and I have been fighting this for some time. The information I have and the experience I have on these cars is very limited. I have used the Snap-on scanner (MT 2500) and cannot communicate, Global OBDII shows no dtc's and very limited P...
1989 Chevrolet Corsica 2.8L Surge, Stall VIN: 2GCECK670I
After performing above repairs we still have one problem left unsolved. Engine starts and idles fine, after warm up restart and it will surge to 1200 to 1500 rpm for 15 to 30 seconds and then stall. If trans is put in gear before engine stalls idle stays stead...
1990 Chevrolet ALLEGRO 454CID No Start VIN: 1GBKP37NOM
Once again I've got an early 90's Chevy with a strange ignition. Motorhome happens to die in front of my shop. No codes, has fuel, has spark. Unplug the four wire connector to the distributor and it runs until it runs out of fuel. Replaced the ignition modual....
1993 Chevrolet C1500 Cheyenne 4.3L wiring column VIN: 1GCEC14Z6P
See above please.
1995 Chevrolet Monte Carlo Z34 3.4L MIL Lamp on, MIL LAMP ON & OFF VIN: 2G1WX12X7S
engine light is on & off intermittantly, there is not a specific pattern. we retrieved code # 1640. we ran through tests for this code & all is ok. cust did originally complain of oil light on dash all the time, which we traced & replaced low oil level sensor.... Trouble codes: P1640 (quad driver a failure)
1998 Chevrolet Cavalier 2.2L abs VIN: 1G1JC5243W
Hi Everyone. 98 Cavalier in with code 1256 (LF motor circuit open/internal ebcm fault) Followed pinpoint testing as per Alldata. All resistances were on spec. Terminals looked good. pretty straight forward diagnosis indicated faulty brake control module. Put i...
2001 Chevrolet Impala LS 3.8L radiator fans VIN: 2G1WH55K01
Customer brought this car in complaining of the radiator fans staying on after he turned off the key and the temperature gauge staying below 140 degrees farenheit. We began by hooking up our scan tool. Engine temp. was above 140 and fans were running continuou...
2001 Chevrolet Prizm 1.8L headlamps VIN: IYISK528X2
this vehicle has a problem with no ground for headlamps, as I understand it they are grounded thru the drl module, if i ground lights they stay on all the time,power to bulbs with the switch off and key on floor board. also the head relay keeps power supplied ...
2002 Chevrolet Venture LS 3.4L transfer case VIN: 1GNDV03E82
What is the proper procedure for removing this awd transfer case? My alldata tells me to remove transmission and transfer case together, but the sub frame goes over the transfer case. It looks like I would have to remove rack to "maybe" get enough room to get ...
2004 Chevrolet Trailblazer EXT LT 4.2L exhaust manifold VIN: 1GNET16S74
Hello We have 2004 trailblazer with a broken bolt in the head on exhaust manifold side. Can not get bolt out so we are going to remove the head, does anyone know if the trick with the 3.5 colorado 5 cylinder engine will work on this enine to hold the timing ...
1981 GMC K1500 5.0L No Start VIN: 1GCEK14H3B
Thanks for any help you can give. Customer states vehicle will not start unless block heater gets plugged in over night. Vehicle had a new engine installed 2 years ago very poor wormanship. I have had vehicle for 5 days first thing in morning I was able to s...
1996 GMC Yukon SLE 5.7L Starting VIN: 1GKEK13R4T
vehicle after a hot soak will some times not start, sometimes it will kick back like timing off & sometimes it will just crank over for a while, eventually it seems to start, also has a new crank sensor. ANY HELP WOULD BE APPRECIATED, THANK YOU, RON
1998 GMC Savana 3500 6.5L Cuts out, Stall, no start VIN: 1GTHG35F4W
hey guys. Don't work on much desiels so i can use some help with this one. This van came in with a bunch of fuses missing under the hood and a fuse blown. I replace all the missing ones and replace the bad one and the truck started up. The bad fuse was located...
2001 GMC Sierra 2500 HD SL 6.6L Stall VIN: 1GCHK23121
engine will start cold (below [...]) run 10,20 seconds and stall in south fl ok most of the time but when truck driven north will act up,if stalled and fuel system primed. engine will start and run ok untill it gets cold again. reprime and all ok. to me sy...
2002 GMC Envoy SLE 4.2L front differential VIN: 1GKET16S03
Greetings to all this envoy will not +go into 4x4.When 4x4 is selected the front driveshaft turns but front wheels do not.I did remove tjhe right side motor t make sure it was working and it was.I then removed the right side axle and removed the assembly which...
1999 Oldsmobile Aurora 4.0L MIL Lamp on VIN: 1G3GR62COX
olds techs please help, 99olds car came in with p0440 purge sol will not command on with tech 2 have 12 volts at pink wire, use dvom between pink wire and green/white wire also shows 12 volts, but it will not control the duty cycle of purge sol. thanks for the... Trouble codes: P0440
1992 Pontiac Bonneville SE 3.8L 4 th all the time VIN: 1G2HX53L4N
Customer brought car in for not shifting. Found code 36 worked trouble tree in mitchell says problem is in trans. Checked for fire at plug and it is there. Grounded solenoids and they click. Has anyone run into this problem i`ve never been in one of these tran...
1995 Saturn SL2 1.9L Sway Bar VIN: 1G8ZK5270S
Hey, Saturn techs! This one has me puzzled and I have been a Saturn tech for 10 years. Anyway, 1995 SL2 customer complaining of noise in wheel rh side. We notice the rh wheel as its going up on the lift is loose. The whole wheel will move a good inch, to two i...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick Roadmaster Limited 5.7L Cuts out, Stall VIN: 1G4BT52P9R
Thanks for all of the replies.. But I'm afraid none were the fix. I started to drop the exhaust to check for back pressure but saw how badly the exhaust bolts were.(bawk bawk) So I stayed away from that, and the rationality of how it ran didn't make sense.. If...
2003 Buick Century Custom 3.1L driver window VIN: 2G4WS52J13
thanks for your help i repaired it with master switch again thank you all for your help
1988 Cadillac DeVille 4.5L Hesitation, Surge VIN: 1G6CD51595
First I want To Say Thanks To All Who Replied I Really Do Appreciate It.I Looked Over All Respones That I Recieved And Tried All Of The Quick Things That Were Suggested.The Customer Wanted A Complete Tune Up (Plugs,Cap,Rotor,Wires,etc.)So I Did That.I Thought ...
1996 Chevrolet Lumina 3.1L raw fuel smell VIN: 2G1W15ZM8T
I don't know exactly what fixxed this vehicle, But after checking the fuel regulator and evap. system again (smoked it), I pulled the tank and replaced o-rings and hoses that had not been replaced before. Vehicle has been o.k. for two weeks now. Thanks for all...
1996 Chevrolet Caprice Classic 4.3L No Start VIN: 1G1BL52W0S
Well fellow iAtn tech, We did it again ,Many thanks to all. Special thanks to David [...] ,Charlie, Gerald, Robert and New Age Garage. for the codes ,Pas Key #. At first pass key #6 didn't work?? Until Gerald mentioned check battery voltage mine was down t...
1997 Chevrolet Cavalier LS 2.2L Poor Idle Quality VIN: 1G1JF5247V
Well after double checking everything the ignition sytemn including cam and cranks sensors are working perfectly. All our sensor readings o-2 map ect iat etc are showing the same at the sensor as the scan data indicates 0-2 after warm up is showing .465-.980 v... Trouble codes: 300 (random misfire history code).
2000 Chevrolet Silverado 1500 5.3L steering box and/or steering pump VIN: 1GCEK19T9Y
Customer drove the truck for 4 days with no tight steering. Temp did dip below zero the first 3 mornings. Special thanks to Kevin [...] by the way, my local GM dealer did not know that it was evev available.
2001 Chevrolet Suburban 1500 5.3L p/s VIN: 3GNFK16T31
sorry this as taken so long.customer decided to take it back to the dealer.i have been wating for an answer to what fixed the truck but learned today that the dealer as had it for a month with no luck.
2002 Chevrolet Express 2500 5.7L ABS Readings VIN: 1GCGG25R72
Well thanks to everyone for their input..Here's the skinny...Took it to the Dealer...they apparently have better diag tools than we do..They hooked their scanner up and found absolutley no problem with the 4WAL system. They stated that our scanner may be at fa...
2002 Chevrolet Trailblazer LS 4.2L Poor Idle Quality, Cuts out, Misfire VIN: 1GNDT13542
I have replaced the No. 3 ignition coil, and have cleanned the connector on the cam shaft positioning sensor. Checked the tension the wire terminal ends. Two weeks later the customer came back and said the vehicle is running fine. Trouble codes: P0172, P0303, P0340.
1997 GMC Yukon SLE 5.7L 1-2 Shift VIN: 1GKEK13RXV
thanks to all who replied.because the fuel pressure was not holding, I decided to address that issue first. based on the replies i recieved, I checked the fuel pressure regulator. after removing the upper intake,I found the regulator leaking. I replaced it and...
1998 GMC K1500 Sierra SL 5.7L steering wheel VIN: 2GTEK19R3W
Thanks for all the help on this one! It turned out to be the sensor on the steering column. This is the first one I have run into and as always I'll never forget it.
2001 Oldsmobile Silhouette Premiere 3.4L Starting VIN: 1GHDX23E01
Thanks for all the help. The problem wound up being the I/C. It shorted out internially some how causing the no start.
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