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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 29, 2004
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1992 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP53LON
I started only having intermittent rpm signal on scanner.I replaced the crank sensor.the car started and ran for 45 seconds then no start since. I do have square wave on crank sensor still.I have 10 volts on cam/crank supply voltage,only have 6 volts coming ba...
1998 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP52K2W
Hello all. I have a 1998 Buick LeSabre with a 3.8l. Came in as no start. Found battery leaking acid. Replaced battery,side post bolts,spacer and cleaned all connections. Vehicle still would not start. Checked fuel pressure-48 psi and within specs. Checked for ...
1995 Cadillac Seville SLS 4.6L MIL Lamp on VIN: 1G6KS52Y9S
car came in with idle speed motor ratcheting.performed caddilac tsb.now chek engine light is on with code 80.ther was not any codes before.tried replacing TPS and the relearn procedure still has light on but not ratcheting iac any more. Thanks in advance Trouble codes: 80 (tps)
2000 Cadillac DeVille 4.6L stabiality system VIN: 1G6KD54Y9Y
discribed in repair history
1993 Chevrolet S10 Blazer Tahoe 4.3L Poor Idle Quality, Cuts out, Misfire VIN: 1GNDT13W9P
Hey guys, This blazer is driving me up the wall! History goes like this: Came in running stinking rich. Found leaks in the CPI unit. Replaced nut kit and entire cpi unit w/rebulit from Linder tech. Car ran but still not very well. Found the dist. off 1 tooth,...
1993 Chevrolet S10 Blazer Tahoe 4.3L Excessive Emissions, Hesitation, Poor Fuel Economy, MIL Lamp on, lack of horse power VIN: 1GNCT18W0P
after stock engine rebuild code 43 comes up. new EGR,new injectors,new distributer,new tranny,new knock sensors,.Code still comes back lack of horse power from start(base timing).pin tested every wire from the computer to the sensors all okay. Tried another co... Trouble codes: 43 (Electronic spark mod. or curcuit problem)
1993 Chevrolet K1500 Cheyenne 5.7L soft brake pedal VIN: 2GCEK19K8P
Customer filled brake fluid resevoir with transmission fluid.also ran vehicle until front right caliper started squirting oil(completly finished brake pads inturn damaged rotor)So we replaced everything as we did not want customer coming back every few weeks t...
1997 Chevrolet K1500 Cheyenne 5.7L Heater core VIN: 2GCEK19R4V
It seems that many technicans have seen this problem before. Looking at the data base you would think someone has the answer. I have changed 10+ heater cores. Some last a month most last less than a week. I have flushed the coolant and insured ph and voltage a...
1997 Chevrolet S10 4.3L Fuel Gauge
The fuel gauge on this vehicle reads full all the time. I started checking at the sending unit, it's putting out about 2.5 volts which seems consistent to how much fuel is in the tank. Next I went to the fuel gauge buffer. It had a good battery power source, g...
1999 Chevrolet S10 2.2L Misfire VIN: 1GCCS1445X
engine has skip on cylinder # 1 under load only in 4th or 5th gear. shop before us replaced for the second time, then a 3rd to be sure plugs and wires. coils, ignition module,crank and cam sensors was replaced also. we have tested the tps,map sensor, fuel inje... Trouble codes: 420 (catalyast efficency)
1994 GMC Jimmy SLE 4.3L Hesitation, Surge VIN: 1GKDT13W7R
vehicle came in would not run found no fuel pressure, replaced fuel pump vehicle started right up and idles fine upon road test when trying to accelerate wonts to stumble and have lose of power back off accelerator vehicle runs fine wont dye no codes no engine...
1995 GMC K2500 Suburban 6.5L MIL Lamp on VIN: 1GKGK26F2S
we put a gm ecm in this viechel a month back for a waste gate selonoid problem,and that problems gone.but we got a new problem about 3days later.when you drive the viechel after it warms up at the point, were the tcc locks up at 180 degrees the mil lites and t... Trouble codes: 36 (injector pulse with long)
1991 Oldsmobile Custom Cruiser 5.0L abs VIN: 1G3BP83E3M
car came in with rear wheel cylinder's froze and code in the abs system #61. We replace the rear wheel cylinders and the abs hydraulic modulator.The pedal is good until you start the car and then it goes to the floor.The front brakes lock up when you stop. No ...
2003 Oldsmobile Alero GL 2.2L No Start VIN: 1G3NL52F73
Hello everyone. Sorry about the long post, but I'm trying to be thorough. This car was towed in as a no start and sure enough-crank but no start. Sound while cranking seemed a little odd to me like maybe a broke timing chain or something. Anyway, on with the t...
1997 Saturn SC1 1.9L Mounts? VIN: 1G8ZH528XW
Hi ALL IN IATN LAND This Saturn has developed a resonate vibration through the steering wheel and dash at ilde. At 55mph, no problem. I can make it worse by moving the motor around with a bar, but can not make it better. There is a TSB that speeks to mounts, b...

Fixes & Summaries for GM
Fix/Summary Answers
1986 Buick Riviera T-Type 3.8L Cluster VIN: 1G4EZ13CXL
Thanks to the five guys that replied. I decided that the cluster that the cust had bought from the junkyard was no better than the one they had before. The circuit board with a little pressure applied would lite up and work fine untill you let go then it would...
1993 Cadillac Eldorado 4.9L Misfire VIN: 1G6EL12B9P
though i had cleaned all the grounds, but with so many response to check grounds, i decided to recheck them. so thank to Ron-Idaho, Robert and Laneard-Texas Edward-California Stuart-New York you all suggested ground problem. Also thank to all others that respo...
2002 Cadillac Escalade 6.0L Temperature Control VIN: 3GYEK63N12
Thanks for the help. I recalibrated the heater controls as suggested and had the same result. It turns out this should have worked but that particular module has a defect where the logic can get mixed up and the unit will not calibrate as designed.This is know...
1991 Chevrolet Caprice Classic 5.0L radio VIN: 1G1BN53E9M
i found a helpful web site called corvetteradios.com. they also said it sounds like a bad rear amp. the customer does not want to go for the 400.00 to fix it. thanks to those who tried to help.
1997 Chevrolet K2500 Suburban LS 7.4L RF Suspension VIN: 3GNGK26J9V
Thank you very much for all the replies. Tom and Ronald hit the nail on the head with the hood hinge. It was loose and causing the noise. IATN is a great place for technicians to share information and we support it as much as we can. Thanks again.
2001 Chevrolet Malibu LS 3.1L Electronic VIN: 1G1NE52J01
Well all of a sudden this car is no longer setting this code! It's been well over a week and don't really know what to make of it all. Other than going tru and disconnecting any related connector, can't find anything obvious. The EBCM does show some external c...
1997 GMC C3500 Sierra SL 5.7L No Start VIN: 1GDJC34R6V
Most all people who replied were correct. The problem was fuel quality. The sender on the rear tank was corroded serevely, needless to say the tank was like a sand box. This vehicle is used by construction crew. I appreciate all the input. TPS reading was .5 v...
1999 GMC Sonoma SL 2.2L Speedometer VIN: 1GTCS1443X
Thanks for taking the time to help us. One of the three replies we recieved was exactly correct. By unplugging the radio, the correct AC signal returned to the IPC, and the speedometer now works. The radio also gets the speed signal from the PCM for SCV (Speed...
2002 GMC Yukon Denali 6.0L radiator VIN: 1GKFK66U32
Gentlemen, I'm calling this a fix. Continued checking and found nothing, then I saw John M.'s reply about testing with hot coolers. Boiled water in my wife's most favorite baking dish. Transmission cooler proved negative, however, engine cooler with high tempe...
1995 Oldsmobile 88 Royale 3.8L Poor Idle Quality, Surge, Cuts out, Stall, MIL Lamp on VIN: 1G3HN25K2S
Thanks for all replys. Put injector cleaner in seemed to help alot. As one help suggested. But over all I think it is an evap problem. Have no training in this area. Would help in locating information on EVAP repairs.Thanks again for all replys you guys are to... Trouble codes: 171 (lean always).
1992 Pontiac Bonneville SE 3.8L Dome lamps VIN: 1G2HX53L6N
Hope everyone had a good turkey day. Living here in Michigan I had to swuffer through another Lions loss. The fix on the dome lamps was to cut apart the splice to all of the lamps and figure out which was shorted to ground. The culprit was the rear reading lam...
1995 Pontiac Bonneville SE 3.8L Misfire VIN: IG2HZ5219S
Sounds like the Chain drive in the transmission is going going gone. Thanks for all replies and Help.
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