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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 14, 2004
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Open Help Requests for GM
Help Request Answers
1994 Buick Park Avenue 3.8L battery VIN: 1G4CW52L0R
pulling two fuses from 8d and 9e stops draw. both must be out. no other disconnections including radio stop draw
1996 Buick Century Custom 3.1L valvetrain noise VIN: 1G4AG55M51
hi fellow iatn guys, have this 1996 buick century with intake gaskets leaking antifreeze externally. replaced intake gaskets and now all the rockers are noisy. replaced valve lifters (rocker-roller type) and intake rockers are not oiling. have replaced lifters...
1989 Chevrolet S10 Blazer Sport 4.3L cyl. 1,3,5 VIN: 1GNCT18Z9K
#1,#3,#5 cyl. are dead. valve movement is good, spark good, compression is good, fuel pressure good, injectors good, computer good, distributor and mod. good, timing good.
1992 Chevrolet Cavalier RS 2.2L Heater VIN: 1G1JC5440N
I have a problem with this vehicle heating. when we purge the air out of the system and warm it up we can get heater air temp as high as 160 degrees at the outlets. but the next day the customer calls back with a complaint of no heat. We replaced the thermosta...
1995 Chevrolet Cavalier Z24 2.3L No Start VIN: 3G1JF12DXS
Happy Holidays ALL. This one is a crank ,no start.Cannot interface obd2 conn. with snapon modis.Missing ecm ground to fuel pump relay w/ cranking;constant ecm ground to a/c comp. relay w/ key on;backup lights stay on with key on in neutral. This vehecle came...
1996 Chevrolet Express 1500 5.0L No Start VIN: 1GBFG15MXT
Van came from another shop. They had put in a used ecm and traced wires. Still blows ecm B fuse. Only seems to blow on shutting the ignition key off. I removed ecm and opened it up. I can see corrosion but no burnt spots or corrosion on board. Looking at wirin...
1996 Chevrolet Cavalier 2.2L Engine VIN: 1G1JC1241T
We suspect the cooling system was hacked up with block sealer at some point because there was goop in most of the coolant passages. We removed what we could and blew air into every open passage. Radiator is clear. Engine still overheats in 10-15 minutes stady ...
1997 Chevrolet K3500 6.5L power steering VIN: 1GDHK33F6V
truck came in last week with problem steering when stopped at a light. The truck has a plow set up on it, so I dropped the plow thinking it would improve the steering. when that didn't happen I replaced the power steering pump. I bled the system it still had t...
1999 Chevrolet Tahoe LS 5.7L Misfire VIN: 1GNEK13R3X
This vehicle has been to two other shops for this complaint now we have it the plugs wires cap and rotor have been replaced previously with no change i believe that there is a problem with the fuel system a poppet valve on #4 that is partialy plugged does this... Trouble codes: P0304
2000 Chevrolet Silverado 1500 4.8L MIL Lamp on VIN: 1GCEK14V5Y
hi guys- im having a problem with this silverado, guy just bought it and the check engine light comes on within seconds after you start it up -(code P0449B)-- even if you clear the codes, ive check for vacuum leaks from front to back and can not seem to find a... Trouble codes: P0449
2000 Chevrolet S10 2.2L Surge, Misfire, MIL Lamp on VIN: 1GCCS1452Y
Net Techs Thanks in advance for any help. I have this 2000 s10 that is giving me fits. The biggest complaint is no power. After clearing the above mentioned codes the only one that reappears is the P0300. Cylinder 1 is the only one I can see counting them up.... Trouble codes: P0300 (Random miss), P0301, P0201 (inj 1 circuit), P0201 (inj 1 circuit)
2001 Chevrolet Malibu 3.1L Poor Idle Quality, Cuts out, Stall VIN: 1G1ND52J31
Help!!!~ Car sent to us on monday by another shop for driveability concern...car runs very poorly, stalls, hesitates, rough idle, overall just running bad. No MIL on and no codes stored, ran fuel pressure test and pressure was low, and fuel pump was cavitating...
2002 Chevrolet Monte Carlo SS 3.8L Door Locks VIN: 2G1WX15K22
Hello all. i got a weird one here and i hope maybe someone out there has also seen this. the door locks will open while you are driving without any comand. but the weird part is it only does this in or rigth after a right hand turn. i dont have the equipment t...
2002 Chevrolet Silverado 2500 HD 6.6L dash lights VIN: 1GCHK23192
Instrument lights do not work when head lights are operated. Also radio display goes out with lights on. Alldata schematics are confusing.Please Help
2003 Chevrolet Avalanche 2500 8.1L 1->2 shift VIN: 3GNGK22G24
A customer of mine has imported a brand new Chevy Avalanche 2500. 8.1liter. After a conversion to right hand drive he has been driving the truck around for a few weeks. He noticed a sudden change in the 1-)2 shift quality. It went from a nice crisp shift to a ...
2004 Chevrolet Silverado 2500 HD 6.0L air bag VIN: JNK45TREER
accident damaged truck replaced air bags and seat belts etc ... the question is does any one found away to program the new air bag module with out using a tech 2 scanner? I have heard that the mastertech is able to use TIS 2000 (any one tried that?) can TIS 20...
1999 GMC Savana 3500 5.7L Mechanical VIN: 1GDJG31ROX
Evening Folks We have this box van that has a strange brake issue. One of our companies bought this truck from Ryder and it was brought to us because the driver said the front brakes would lock up on wet surface and slide,what made it worse was when the ABS w...
1995 Pontiac Grand Am SE 2.3L low power VIN: 1G2NE55D7S
THis car was towed in due to a stall. Cust said he was driving along and the car just lost power and died I first tried to start and the batt was dead. After charging a while I tried again to start but the car was hard to turn over Almost like trying to start ...
1999 Pontiac Firebird 3.8L MIL Lamp on, limited power VIN: 2G2FS22K5X
This vehicle has an intermittent problem that of course won’t act up when we have the vehicle. The “reduced engine power" light comes on along with the MIL lamp. Code P1221a (TP sensor 1-2 performance) is set in memory. The problem has occurred twice in the... Trouble codes: P1221 (TP Sensor 1 2 Performance)

Fixes & Summaries for GM
Fix/Summary Answers
1989 Buick Skylark Custom 2.5L No Start VIN: 1G4NC54UHK
thanks everyone for ideas! put a used injector in it because it was an old car didnt what to put alot into, and it purrs like a kitten. thanks again. happy holidays
1992 Buick LeSabre Custom 3.8L battery light VIN: 1G1JF51T6R
Well Christmas came early this year after all the checking a student pulled the cigarett lighter out and found a penny inside removed penny and and alls well . the nice lady the car belongs to and I thank you I had 8 replies and several phone calls I think a...
2000 Buick LeSabre Custom 3.8L Poor Idle Quality, MIL Lamp on VIN: 1G4HP54K7Y
thanx for the replies,but i had checked all of them pryer to my post.a fellow tech at our shop(todd crewe)mentioned that he had chased this before.a broken valve spring!!it would seal & run good, mostly hot.it would have misfire on cyl. 5,then cyl. 6.the exhau... Trouble codes: P0300.
1995 Cadillac Seville SLS 4.6L MIL Lamp on VIN: 1G6KS52Y9S
I followed the GM TSB again except that the A?C didnt work on the car.so we had to temporary fix the A?C to finish the reset procedure.good as new now.Of course we took the freon back out when we were done. Trouble codes: 80 (tps).
1996 Cadillac Eldorado 4.6L Misfire VIN: 1G6EL12Y1T
I want to thank all who responded to my help request. Some said I was dealing with a coil issue, some said injector problem. I am embarrased to say it turned out to be plug wires. My scope was out of service for a few days so I didn't hook it up, the misfire c... Trouble codes: P0300.
1997 Cadillac Catera 3.0L blower VIN: W06VR52R6V
catera fixed. the problem was the blower controller. there was a lot of confusion about this part. the part is located in the blower assembly which is a large plenum that belongs under the dash. when the part showed up, i saw that the blower controller is hous...
2000 Cadillac DeVille 4.6L stabiality system VIN: 1G6KD54Y9Y
thanks to all that responded, i replaced the steering column position sensor and everything works great. thanks again troy
1973 Chevrolet Pickup 454CID valve train VIN: CCZ143J158
I talked to the customer today, we've discuss digging a deeper to pin the problem down and finish it next year after the holiday's. I want to thank all of you for your suggestions.
1994 Chevrolet K1500 5.7L Stall VIN: 2GCEK19K9R
Hi Everyone, thanks for all the great information! What I learned is that the factory hides these connectors in several locations depending on the exact year. It could be taped to the wire loom that passes behind the brake booster. There are some connectors th...
1997 Chevrolet Camaro Z28 5.7L antitheft, dash VIN: 2G1FP32P6V
Thanks to all of you that replied. Most of you hit it right on the head with the ignition switch. Found the contects at the ignition switch burnt. I replaced the ignition switch and everything works fine now. The customer had stated that they had been having t...
2001 Chevrolet Silverado 3500 8.1L brake pedal VIN: 1GCJK39G51
customer does not seem to be in a hurry to return the vehicle. Therfore I am closing the post. Thanks to the 9 of you who replied. The pedal pushing up is a normal operation of the hydro vac system. Most of you suggested the system may need bleed using a Tech ...
2002 Chevrolet Impala LS 3.8L hard start VIN: 2G1WH55K82
well i think it's fixed. we replaced the ckp based on a recommendation from tac and one help reply. it seems to start better now. the car was gone on monday. apparently the 'rental fairy' left town. if the car returns for more diagnosis or repair i'll open up ...
2002 GMC Sierra 2500 SL 6.0L Long crank time VIN: 1GTGK29U32
Hi everyone, The customer decided to live with this one as is. Before it left I removed the injector rail to physically watch the spray and look for leaking injectors - all was ok. I also tried a new cmp sensor with no change. Most of the replies I got rel... Trouble codes: P0160 (Low O2 activity bank 2 sensor 2), P0140 (Low O2 activity bank 1 sensor 2), P0300 (Random misfire).
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