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Prev Professional Automotive Repair Technical Discussions for September 2, 2004
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Open Help Requests for GM
Help Request Answers
2000 Buick LeSabre Custom 3.8L tcc apply VIN: 1G4HP54K1Y
hello trans guys, this is my problem. my customer came in and said her car "jerks or skips" sometimes. i thought i would find an ignition miss,but that is not the case. what i am finding is that the car will shudder at the end of the tcc apply. i right away fi...
1992 Cadillac Fleetwood 60 Special 4.9L No Start VIN: 1G6CG53B4N
This vehicle starts, then stalls immediately. My noid light flashes for a second then stops causing the car to die. I have only code 52 (ECM reset). It seems like a theft deterent system problem to me. The car cranks O.K, so the theft det. relay and the Pass K... Trouble codes: 52 (ECM reset)
1994 Cadillac Seville SLS 4.6L no 3-4 shift VIN: 1G6KS52Y7R
this car shifts great 1,2,3, then when time to shift to 4 goes into limp in mode and check engine light comes with code po94. changed solnoids same problem. I have 12 volts to solnoids and when computer grounds them they will still have 12 volts on one side an...
1979 Chevrolet LUV 1.8L voltage regulator VIN: CLN1498297
Vehicle came in with a complaint of won't idle and charge light on. We found that the external regulator was blown wide open and alt was charging in excess of 16 volts. We changed the regulator, vehicle would idle and max output was 14.5 volts. Released vehicl...
1982 Chevrolet Corvette 5.7L No Start, Contamination VIN: 1G1AY8781C
This C-3 is worth plenty of money...once it runs. Extremely low miles, mission is to get it running. Unfortunately the fuel tank sender and pump assembly has rusted off in the tank and severe contamination is evident. Although there is rust in the tank it appe...
1991 Chevrolet Lumina Euro 3.1L Cuts out, Stall VIN: 2G1WN54T2M
Thanx in advance for any help all right you g.m. guys we have so much diagnosise time in it isn't funny. loosing our hair this lumina will start and idle. when hooked up to the snap on scanner when the car is dead cold scanner says that the cat temp is 766 deg...
1994 Chevrolet S10 Blazer Tahoe 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1GNDT13W2R
vehicle is flooding out. Intake is filling up with fuel on the drivers side ( the side with the supply lines) I have replaced the injector and regulator with an ac delco. I have also replaced the fuel supply lines. I have pressuresed the fuel sustem with the p...
1995 Chevrolet S10 2.2L Poor Idle Quality, Hesitation, Cuts out VIN: 1GCCS144XS
the vehicle came in and was not running- customer had purchased vehicle from a junk yard- We inspected the vehicle and found that if we tapped on the ECM, it would either die or smooth out considerably- found that the CTS was disconntected and packed with dirt... Trouble codes: 15 (coolant temp sensor), 34 (map sensor I caused this one trying to see if ECM works), 22 (tps sensor), 54 (fuel pump relay or circuit)
1996 Chevrolet K3500 Cheyenne 7.4L Unknown VIN: 1GCHK34J2T
Hi everyone, I am working on this one ton pick-up with a 4L80E transmission.It seems to have a couple of intermittant problems. First of all, the trans will upshift into 2nd gear and hang in 2nd gear. Sometimes it will go ahead and upshift through the rest o...
1998 Chevrolet K3500 Cheyenne 7.4L climate control VIN: 1GCHK39J7W
thanks in advance; i need a wiring schematic, for climate controls, replaced evaporator drier orface tube flushed system evac and recharged system, system works mechancaily if someone has the schematic my fax number is [...]. thanks again for any help
2000 Chevrolet Impala 3.8L Hesitation, Stall VIN: 2G1WF55KOY
vehicle will start and stumble ,sometimes die occasionally will have loger than usual crank time till starts fuel pressure on spec no codes set, other times sarts as if it was new
2000 Chevrolet Impala LS 3.8L rpm flares up VIN: 2G1WH55K6Y
this impala(wh model)about once per month during idle the rpm will race to well over 2,000 rpm of it's own accord, but for only a few seconds. the first time this occured there was nobody in the car and the engine raced twice in neutral. then at least a month ...
2003 Chevrolet Trailblazer LTZ 4.2L door locks VIN: 1GNDS13S03
customer wants to add keyless entry... front door lock are normal wiring rear doors work off serial data. I was wondering if bcm can be reprogramed? One of my guys used to work at a dealership and he said it could be. Any ideas and help would be appreciated.
1986 GMC G1500 Vandura 4.3L flywheel VIN: 2GTCG15N7G
Hi guys. Sorry to bother you with such a basic problem. this truck eats flywheel at a glutenous pace. 5 in three years. We got this from another shop. the last fly wheel lasted one month. they all break the center out of them. there seems to be a large amount ...
1997 GMC K1500 Sierra SL 5.7L Cuts out, Stall, Misfire, backfire through exh VIN: 1GTEK19R2V
This one only gives us 20 minutes or less to diag. It will straighten up & run well after a 10 min run and only after It has set overnight. If it sits all day it is ok. Only an overnight sit will the symptoms occur as follows: When taking off it will backfire ...
1994 Pontiac Firebird 3.4L Wipers VIN: 2G2FS22S4R
Vehicle came in with wipers trying to park in the up position. I have gone through the tests in Mitchell and they lead me to believe that the switch was out. It is not because I hooked up a new one and there is no change. The information about the timing gears...
1996 Pontiac Firebird 5.7L MIL Lamp on VIN: 2G3FV22PXT
Good day this Firebird came in with mil on,code 0441.I had vacum out of the purge solonoid at all times and turning the solonoid on or off did not make a differance,changed the solnoid and the canister(leaking) and sent the customer on his way ,car came 3 days... Trouble codes: 0441 (Evap systemno flow during purge)
1999 Pontiac Montana 3.4L Poor Idle Quality VIN: 1GMDX03E4X
has intermitant high idle (1300 to 1600 rpms) there are no codes and the TPS voltage is .48 moving a little to .46 but the TPS % is anywhere from .3% to 5.0% semes like idle will be high when at 5.0% if I turn key off and on it will come down to 3.1% and off a...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick Park Avenue 3.8L rotors/drums VIN: 1G4CW52L7R
Just received the GM video and book for Teves mark 4,55205.04.1 and don't really see anything there on diagnostics for the hyd system.This mostly deals with the electronic part.Spoke with the cust yesterday and so far ir is not getting as bad as it has in the ...
1997 Buick Riviera 3.8L No Start, Stall VIN: 1G4GD22K7V
thank you very much for everyones help,i have fixed this one.i replaced the fuel pump,after it finally died completely.
1993 Cadillac Eldorado Sport 4.6L Poor Idle Quality, Surge VIN: 1G6EL12Y7P
hi guys thanks for your input . i did clean thottle body and did find clogged air passages also proformed idle relearn twice still alittle sluggish but seams o.k. customer took car on vacation have not herd from her as yet Trouble codes: 32 (map sensor low or shorted), 71 (inter map signal).
1989 Chevrolet Beretta 2.8L Cuts out, Stall VIN: 1G1LV14W8J
After running further test, we decided to try a different injector. So far the vehicle is doing fine. Thanks again for your help.
1997 Chevrolet C1500 Suburban 5.7L No Start VIN: 3GNEC16RXV
thanks for all the replies, the problem ended up being the old and the new ignition module being bad. we had a signal from the crank sensor ,but we had no pulse on the c circuit wire on coil from control module, but it was new so we checked everything that was...
1994 Geo Metro 1.0L No Start VIN: 2C1MR2466R
thank you all very much for your help. the problem turned out to be an open in the ignition signal circuit(brown wire between the pcm and the noise suppressor filter) replace wire and it now runs. thanks again Trouble codes: 41 (ignition signal).
1996 Pontiac Sunfire SE 2.2L No Start VIN: 1G2JB1241T
thanks for all the help .turned out to be anti theft modguel. the bigest problem was getting a wiring sch for a 1996 theft system.
1997 Pontiac Firebird 3.8L brake lights
First of all thanks to all 32 people who took time out of their busy day to lend me some advice. I am almost embarrest to post the fix, I tried the hazzard ( 4 ways ) 1 time, and then brake lights started to work, The button was kind of stiff at first, but I...
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