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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 17, 2004
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Open Help Requests for GM
Help Request Answers
2000 Buick Park Avenue Ultra 3.8L Cuts out, VIN: 1G4CU5212Y
We have not had vehicle act up. Customer says it will happen about every 6 weeks. He will be driving along & steering stability light would illuminate , car would die down to almost a complete stop & then take off again. Initially it would happen on dips & cur... Trouble codes: U1040 (Loss of comm. ECM), U1088 (Loss of SIR comm IPC), C1281 (VSES sensors uncorrelated)
2000 Buick Park Avenue 3.8L pcm VIN: 1G4CW52KOY
hey guys. this car came in about 2 months ago with a new starter from another shop but it still wouldn't start it had a code 1626 (theft deterrent fuel signal not received) code in it. I followed the trouble tree in alldata exactly. and it directed me to repla...
1992 Cadillac DeVille 4.9L door locks VIN: 1G6CD53BXN
I got this car with inoperative power locks, it holds the lock motors in the unlock position. If you push the switches to the lock position, it will cause the motors to run and try to unlock, causing a battery drain. This thing is driving me nuts, had it in ab...
1994 Cadillac Eldorado Touring 4.6L No Start VIN: 1G6ET1290R
Hello I sure could use some help with this vehicle. the customer states it has been running fine up until this time. She tried to start it one day and could not. We check fuel and spark. Fuel pressure is 45 psi and has good spark. we checked for injector sign...
1998 Cadillac Catera 3.0L abs sensors VIN: W06VR52R9W
i need help from a caddy person. after the trans was reinstalled the trac control and abs lites were on and the speedo was inop however it all works about ev ery othber time it is run. the output shaft sensor and connector plug werte replaced to no avail. ther...
1988 Chevrolet Corvette 35th Anniversary Edition 5.7L MIL Lamp on, CODE 36 VIN: 1G1YY2185J
went down the diag chart. checked powers and grouds ok. check function of the relays ok. you can not clear the code. if you clear it it comes right back on. pin tension is ok. wires are ok. Trouble codes: 36 (maf burn off)
1993 Chevrolet K1500 Cheyenne 5.7L cooling system VIN: 1GCEK19K4R
Thanks for your time. Customer brought in vehicle with a suspected blown head gasket. Upon inspection, discovered that the coolant overflow tank was full to the brim with engine oil and cooling system was full of emulsified oil/coolant. Draining the crankcase ...
1994 Chevrolet Lumina Euro 3.1L blower motor VIN: 2G1WN14T8R
about every two weeks, the battery is completley dead from an overnight soak. with the customer driving on a dailey bases.checking with a current probe there are no drains from the battery. yesterday after a lof, as we're letting the car down on the lift the...
2001 Chevrolet Tahoe 5.3L Poor Idle Quality, Misfire VIN: 1GNEC13T31
whats happening is that we have good compression,good fuel pressure,good spark,plugs are fine. it missing on #1 & 7 cly. have good vaccum. 17 in. no noticible signs of vaccum leaks, trying to figure out if the intake gasket could be leaking without no possible... Trouble codes: P0300
1998 Pontiac Sunfire SE 2.2L Air Bag Lamp VIN: 3G2JB1241W
Air bag & Seatbelt warning Lamps on, no communication with scanner (communicates for PCM) , I have unhooked and re-installed the remote starter trying to correct problem with no luck. I still wonder about the anti-theft bypass (because it has to have a signal ...
2000 Saturn LS1 2.2L cooling fans
vehicle came into our shop complaing that the cooling fans run continuosly on high when the vehicle is started. went in to the system with scan tool and found that i could turn fan relay 1 & 2 on and off with no problem. when looking at the data with the fans ...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick LeSabre Limited 3.8L speedometer VIN: 1G4HR52KXV
Hi Iatn I believe the vehicle is repaired.We quoted on removing the cluster and having it repaired.The custumer wanted to wait until after there holidays.I tried one repair before releasing the car.We removed the ecm conector and checked for corrosion.I tighte...
2001 Cadillac DeVille DTS 4.6L Tire sensors VIN: 1G6KF57971
Thanks to all who replied on this one. Almost everyone had the right answers. The vehicle ended up going to the dealer and all was covered under warranty. They replaced the front wheel sensorand also replaced her steering rack. (that took care of the steering ...
1981 Chevrolet Monte Carlo 4.4L wipers VIN: 1GAZ37J6BZ
Well I got it to act up this morning and was able to volt drop the grounds as suggusted on both the motor and switch all was ok. So then I tapped on the motor and it parked! So I turned it on again and was lucky enough that it acted up again, so I tapped on th...
1994 Chevrolet K1500 Cheyenne 5.7L backfires VIN: 1GCEK14K6R
Thanks to everyone that replied. After thinking it overnight I just couldn't get past the speedometer and the cruise having something to do with this. So this morning I rechecked the 4 ground wires that are on the thermostat housing and I found that one set ha...
1996 Chevrolet Blazer 4.3L Misfire, MIL Lamp on VIN: 1GNDU67W7T
Got it fixed. Pulled the plenum off and found the #6 poppet was blown out of lower intake and also melted,#4 poppet was partially blown out,confirming my thought of my original ignition problems causing a backfire and damaging poppets. Replaced #6 injector/pop... Trouble codes: P0306.
1997 Chevrolet Astro 4.3L MIL Lamp on
Thanks to everyone who offered advice. The problem turned out to be the MAF sensor. The sensing wires inside were indeed covered with lint, dust and believe it or not rust. The contamination only skewed the signal voltage by .2 volts, but it was enough to caus... Trouble codes: P0121 (TP sensor performance).
1991 Geo Metro 1.0L Low vacuum VIN: 2C1MR2466M
Hello everyone and thanks in advance for the help on this one. The fix ended up being this: When we put the engine together, we used 1994 single compression ring pistons. This engine would only build 125-130 lbs of compression, not nearly enough. These shoul...
1994 Oldsmobile 98 Regency Elite 3.8L alternator VIN: 1G3CW52L5R
Thanks to you that replied. I had replaced the voltage regulator and rectifier. Problem solved. Charging voltage varies between 14.3 to 13.1 depending on load. Thanks Rick
1995 Oldsmobile Aurora 4.0L trans shifting VIN: 1G3GR62C4S
thanks for those who replied , i know your time is valueable.. i took the valve body off and sure enough the solenoid was cracked..replaced two sol. and clip to hold filter in and now shifts ..some of you gents have seen this before thanks for your expertise.....
1997 Oldsmobile Silhouette 3.4L Misfire VIN: 1GHDX06E7V
Hi Group again,thanks for all the good responses from you all.russell from south dakota got me on the right track.he said if it did not start the bucking with the torque converter disingaged he would look for a transmission problem.i then took the vehicle for ...
1997 Pontiac Grand Am SE 2.4L ebcm? VIN: 1G2NE52T7V
hello all, and thanks for all the great tips, many of you suggested that i check 3rd brake light bulbs, and yes that would cause a c1293, and several of you also suggested checking ignition switch, its amazing what intermittent / poor voltage will do... howeve...
2000 Pontiac Firebird 3.8L MIL Lamp on, no throttle response VIN: 2G2FS22K8Y
Well, this one is fixed. I got three replies, one said computer problem, one said throttle sensor, and then Jason [...] replied that he just fixed one like this by replacing the ignition relay in the underhood fuse box. Although I never got the car to act up... Trouble codes: P1125, P1276, P1281, P1286.
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