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Prev Professional Automotive Repair Technical Discussions for January 24, 2006
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Open Help Requests for GM
Help Request Answers
1989 Buick Electra Park Avenue Ultra 3.8L clutches VIN: 1G4CU54C6K
Car came to me originally with slow engagement of 2nd gear. Rebuilt it and reinstalled, and it worked fine up in the air with the exception of no 3-4 shift. Took it for a road test, and within ten miles, lost 3rd gear also. Took it out and tore it back down to...
1994 Buick Park Avenue 3.8L no power VIN: 1G4CW52L4R
This car came in with a complaint of running rough. When driving the car and you push the gas pedal to the floor the engine acts like it is starving for fuel and the vehicle begins to slow down. I have checked fuel delivery rate and fuel pressure all are wit...
1999 Buick LeSabre Custom 3.8L windows,locks,dash warning lights. VIN: 1G4HR54KOY
Please help. This problem seems to happen most of the time driving down the highway. The dash warning lights blink on and off, radio goes off including the clock. Customer claims a grinding noise {relay?} under dash, lasts for a few seconds, clock comes back t...
1981 Cadillac DeVille 6.0L display VIN: 1GD6AD6999
as the story goes, the computer was replaced and following that the digital display for the heater control and mileage center went blank. i have run the display trouble shooting tree, it goes to the ecc control head. it has power to l, nothing at m, ran a test...
2001 Cadillac DeVille DTS 4.6L traction control VIN: 1G6KF54931
This problem has been intermittent, and been a problem for a long time, Customer states that at times the traction control light will come on but would reset everytime he turned the key off, The key to my problem is that the traction control light will only co...
1970 Chevrolet Monte Carlo 350CID wiper motor
Customer is bringing semi-restored car in for front end work and asked us to repair the wiring to the wiper motor. Does anyone have a diagram for the windshield wiper motor or where I can get one? Thanks for your time!
1996 Chevrolet Blazer 4.3L engine VIN: 1GNDT13W7T
Replaced leaking intake manifold and changed oil.DID NOT over torque bolts due to the TSB. Coolant leaking into the engine. Customer came back with noisey motor. Removed oil pan after checking oil. Oil was very silver. Found bearings not spun but scored. Repla...
2001 Chevrolet Tahoe 5.3L Surge VIN: 1GNEC13T91
eng noise when cold Trouble codes: 171 (bank 1 lean), 174 (bank 2 lean), 300 (mult missfire)
2001 Chevrolet Impala LS 3.8L vats/bcm VIN: 2G1WH55K11
The car will not crank at times. Simple right. However, it will "not crank" with enough consistency to do any testing to see which component it is. This system does not use the chip in the key but rather the magnetic signal around the ignition switch. The valu...
2002 Chevrolet Cavalier 2.2L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 1G1JC12432
Hello, This car has repeated injector failure on different cylinders. The failed injector is always stuck open. After you replace the failed injector, the car runs fine and has no problems that I can detect for about 1 week. Then the customer gets in to start...
2003 Chevrolet Silverado 2500 6.0L Front Passenger Door VIN: 1GCHK23U83
Truck has several symptoms, but unfortunately I have no schematic. Truck worked fine on Saturday, then on Monday keyless entry didn't work. Tried other key fob, same symtom. Discovered that the front passenger door is dead... no power window, no power lock, do...
2004 Chevrolet Avalanche 1500 Z66 5.3L speedometer VIN: 3GNEK12T24
the speedo will stick or go to 120mph some times no check engine light or codes has not acted up for us to test any ideas
1994 Oldsmobile 98 Regency 3.8L key security VIN: 1G3CX52L6R
Is there a way to bypass this system , As the key and key cylinder are completely worn out, will only work when it wants to, and being here in the Dom rep to get these part here will take forever to get here, plus the customer short on cash. Can the security m...

Fixes & Summaries for GM
Fix/Summary Answers
1990 Buick Century Limited 3.3L Excessive Emissions VIN: 1G4AL51N6L
Sorry I took so long to get back to you on this one, but I just got it repaired. I had already cleaned the MAF, though it wasn't dirty. Did an injector cleaning with Ford injector cleaner, no help. Decarbonized, no change. Spoke to customer, and she said the c...
1995 Cadillac Fleetwood 5.7L rear auto level control VIN: 1G6DW52P8S
thanks for the help. i found a leak at the rear shock where the air hose connects. i sprayed it with soapy water but could not see any leaks so i got some liquid soap and poured some in my hand and pushed it into the air hose fitting at the rear shock and it b...
2000 Cadillac DeVille 4.6L cooling system VIN: 1GEEH90Y0Y
We have come to the conclusion that the head gaskets are leaking and there is also the possiblity that the head bolts are stripped and pulling out of the block. We are trying to sell the engine because of the amount of miles on the vehicle. The job is pending....
2002 Cadillac Escalade 6.0L fuel gauge,battery light VIN: 1GYEK63N32
thanks all. most said to clean grounds on cyl. head, which are really hard to reach, but didnt help. also stated was the ignition switch.I replaced the ignition switch,drove all weekend and then started again. any more help please
1993 Chevrolet Astro CL 4.3L No Start VIN: 1GNDM15W4P
Hi guys, I pulled off the plentium. Most of you hit it on the nose. The fuel pressure regulator is taking a serious piss in there. We'll try to get a regulator for it. If not, might to change the whole unit. Thanks again!
1999 Chevrolet Express 1500 5.0L No Start, Hesitation, Cuts out, Misfire VIN: 1GACEG15M4
I moved the crank sensor out as I have herd of the plastic timing covers warping causing the crank sensor to not 'see' the windows intermittently but this did not help. I suspected computer but wasn't sure that a computer could cause the long missing low parts...
2001 Chevrolet Tracker LT 2.5L No start VIN: 2CNBJ63451
Thanks all for the help. Turns out Dave from Ill. had it. When I removed the intake I noticed the carbon was loose on the valves. The machine shop confirmed it and now runs fine. Thanks again for the help and we here at Lenharts look forward to helping others....
2003 Chevrolet Trailblazer North Face 4.2L starting VIN: 1GNET16S53
thanks for all the help brett you were right on there was a rock jammed in the trans mount thanks again mike
1992 GMC Jimmy SLE 4.3L Alternator VIN: 1GKDT13Z4N
Well, it looks like this one is fixed. We checked everything from top to bottom again. There were no add-ons or extra accessories on the vehicle. We finally decided to get away from the Napa mindset and try an AC Delco alternator. It has been running now for a...
1997 GMC C1500 Sierra SL 5.7L trans & gauges VIN: 1FABP37856
Thank you all who replyed. My gauge and transmission problem turned out to be a battery terminal that was corroded and loose. most replys said it was the ignition swicth and a couple said battery cables. As of yet the problems went away. Thanks again.
1998 Oldsmobile Bravada 4.3L Electronic Climate Control VIN: 1GHDT13W4W
Well, this one is finally fixed. After we had replaced the actuator for the codes P0408 & po416 our customer had come back saying that it wasn't working properly yet and when we had checked again for codes the same two codes were back again leading us to belie...
1995 Pontiac Grand Prix SE 3.1L rear rotors,calipers pads VIN: 1G2WJ52M2S
thanks guys,i did replace the rotor,caliper,pads,and a new hose per your advice,could not prove any of these parts faulty,the new caliper was easier to operate though,the hose is something that makes sense and it was the original,so i tried it,the proportionin...
2000 Pontiac Bonneville SE 3.8L Stall VIN: 1G2HX54K8Y
Found that the power coming into the exciter module on lock cylinder is loosing voltage. Traced voltage coming in and out of pass theft module and it is going to 0 or 4 volts. Traced power coming in and out of ignition switch to theft module. Found that the ig... Trouble codes: P1626 (Theft Deterent System SIgnal).
2002 Pontiac Grand Am SE 3.4L door locks VIN: 1G2NF52E62
I'm trying to put a close to this. The customer being limited on funds did bring the car back in. I found two more wires shorted to ground. After repairing them I did replace the bcm. Door locks did start to work but after a short time they did become intermit...
2003 Saturn Vue 2.2L fill fluid VIN: 5GZCZ33D23
OK. . .pretty basic on this one really. I was only really after the location of the fluid fill port. The fill port on this transmission is located under the main engine wire harness, near the top of the transmission - toward the front of the vehicle, under pla...
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