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Prev Professional Automotive Repair Technical Discussions for November 6, 2006
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Open Help Requests for GM
Help Request Answers
1997 Buick Century Custom 3.1L MIL Lamp on VIN: 2G4WS52MXV
This vehicle keeps setting a P0440 code. Have smoked EVAP system and found on leaks. Have gone in and activated both purge solenoid and vent solenoid with scan tool and both are working properly. Have tested fuel tank pressure sensor and is within spec and not... Trouble codes: P0440 (Evap System)
1991 Chevrolet Caprice Classic 5.0L rotors/calipers VIN: 1G1BN53E4M
Hello again, This is my best customers car and he hauls mail on a one hundred mile route with rough roads. He complains that the right front brake will smoke intermittently. Since his complaint I have replaced the right front caliper and hose again along with ...
1997 Chevrolet Blazer 4.3L starter VIN: 1GNDT13W3V
we put the alternater on becuase the bearing was bad now the vehicle will not start came in the shop starting just fine. we checked power to the starter and alternater but none from there. does have a factory security system were you have to unlock the doors ...
2000 Chevrolet Silverado 1500 4.3L engine VIN: 1GCEK14W0Y
Help!!! This vehicle came in with the customer complaining of a belt squeek. We found the old belt to be the wrong size, which of course caused the squeek. We then installed the proper belt. The sqeek is gone, BUT now we have a random and relatively loud knock...
2002 Chevrolet 6500 450CID no reverse VIN: 1GBJ6HIC42
This is our own flatbed.Went to move it this morning,it only had forward gears in fact neutral is also a forward gear with reverse being neutral we disconnected the shift cable and moved linkage the ourselfs-no change has anyone heard of anything like this?
2004 Chevrolet Suburban 1500 LS 5.3L Drive-axles VIN: 3GNFK16Z24
04 suburban i have a leaking 4wd rh axle seal. and i want to know if i need to remove the axle housing (tube)to replace a rh seal. i know this should be easy but the manual also says to remove the differential assembly to replace the left side seal and its not...
2005 Chevrolet Aveo LS 1.6L shift interlock VIN: KL1TD526X5
hey guys i am haveing problems with this shift interlock not allowing me to shift from park when you depress brake pedal and shift interlock is not working,i have replaced the shift interlock aswell as replaced ignition switch checked all the fuses founf no bl...
1999 GMC C6500 7.4L No Start, Poor Idle Quality, Surge, Stall, Misfire VIN: 1GDJ7H1DXX
Vehicle acts up mostly warm. Sometimes won't start, as you let off ignition switch sometimes will backfire. If it backfires let off switch and try again and will start. Have replaced all grounds. originally had no CEL with Ign. switch on and would only crank f...
1992 Oldsmobile Cutlass Supreme S 3.1L rear pad VIN: 1G3WH54T8N
I remember these from the old days. Usually the caliper pins were rusted and calipers wouldnt move. This has a reman caliper 2500 miles ago. Pins are free and its the outer pad thats worn out. Any ideas appreciated.
2001 Oldsmobile Intrigue GX 3.5L Poor Idle Quality, Hesitation, Cuts out, MIL Lamp on VIN: 1G3WH52HX1
Hi Techs,this 3.5 olds is runnig good cold,but after 2 km it bucks and some times want to stall,if it happen the ecm lights flashes but no code,this happen intermittend but it is good for no more than a few min.Replaced ckp,checked wiring from ecm to ignition[...
1992 Pontiac Grand Am SE 3.3L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire VIN: 1G2NF54N7N
i need a little hlep here. this grand am is hard starting ( back fires when trying to start ) hot or cold, idles bad when running. scanned computer for codes and no are found. here's what we have done so far. tested full pressure and is good, coolant temp sens...
2002 Saturn L300 3.0L speedometer VIN: 1G8JW54RX2
Interior lights flickers . Temp gauge gos hot to cold. Water, battery, oil, security light flickers. Speedometer add on mile. Transmission shift selenoid clicks. All occurs with key on engine off or with engine running

Fixes & Summaries for GM
Fix/Summary Answers
1994 Cadillac Seville STS 4.6L Charging VIN: 1G6KY5295R
yes, this car if fixed. it was supposed to have a thin red wire coming out of the harness and going to the L term. someone cut the wire stuffed it inside the harness. i bought a plug connector hooked up wire and presto everything works great. thank to everyone...
1996 Cadillac Seville SLS 4.6L No Start VIN: 1G6K552Y7T
Thanks to all that replied. I went to basics and found that the small pink wire to the ignition 1 relay rubbed through and lost power on fuse.There are 2 pink wires one large one small. Remember that power comes from the fuse to the relay so you dont test wron...
1993 Chevrolet Corvette 40th Anniversary Edition 5.7L Hesitation, Cuts out, Stall VIN: 1G1YY23P9P
Thanks for all the responses. Ive checked/replaced most of the items mentioned in the replies to no avail. I had the injectors flow tested and profetionally cleaned, New ECM, new PROM, new IAC valve, ETC. THE FIX... Some one had put a redundant ground on the T...
1995 Chevrolet K2500 Cheyenne 6.5L No Start, Misfire VIN: 1GTEK14S1S
i would like to thank all that replied. most suggested problem was either glow plugs or inj. pump. the glow plugs were new and the inj pump was 2 years old. the owner only uses the truck for plowing so he decided to park the truck inside and live with the prob... Trouble codes: 36 (injection pulse width response time long).
1996 Chevrolet C1500 5.7L No Start VIN: 2GBEC19R1T
Sorry for the long wait. I wanted to make sure it was fixed. The fix turned out to be an interminant short in the crank position sensor harness. Thanks for the replies. Daniel Trouble codes: P0336 (ckp a circuit performance), P0339 (ckp a circuit intermittent).
1997 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W1V
thanks for all the replies but it was the ing. switch asy.
1999 Chevrolet Corvette 5.7L instrument cluster VIN: 1G1YY12G1X
i went thru all grounds & ground splice packs cleaned all. still had problem. replaced hazard switch this solved two codes. the fix for the intermittent cluster activity was a short to voltage due to a bad connection in passenger side door harness. it was send...
2000 Chevrolet Tahoe LT 5.3L Battery VIN: 1GNEK13T9Y
Thanks for all the replies to this problem. They ranged from a bad BCM, to bad batteries, to On-Star modules. I was testing some wires with it running when I noticed the battery pushing out water. I checked the alternator again (I had done it previously) and f...
1988 GMC K3500 Sierra SLE 7.4L reverse VIN: 1GTGK34N8J
well this one is fixed! had alot of great replies. a few were adressing the idle but i found a tsb for that and acording to tsb idle is in check now. it was suggested that i check timing and vac. leaks. i had that covered at a previous time, but double checked...
1996 Pontiac Sunfire SE 2.2L Misfire, MIL Lamp on VIN: 3G2JB5240T
Sorry for the delay in posting a fix, still not sure if the car is completly fixed because it is out of the state now. We put the three wire sensor on that came with the used motor on with the Module and Coil Pack from the old motor, eleminating one of the w... Trouble codes: P0300 (Random misfire), P0335 (Crank sensor circuit A malfunction).
1997 Pontiac Grand Am SE 3.1L alternator VIN: 1G2NE52M9V
sorry i forgot to reply sooner. it seems the fuse block in the engine compartment was melting inside. so the smaller hotwire was not giving a full 12 volt supply, and only intermittently since it was a hot at all times wire and the only part of the box that wa...
2001 Pontiac Bonneville SE 3.8L Poor Idle Quality, MIL Lamp on VIN: 1G2HX54K01
Customer couldn't wait a couple of days and took car to dealer. They found hidden damage to 0-2 sensor harness. Had 7 replies. and 3 provided wiring info and checks. Should have been a big help. Thanks, Nick Trouble codes: P0135.
2001 Saturn L300 3.0L Excessive Emissions, MIL Lamp on VIN: 1G8JW52R01
Replacing the BCM did the trick. All is good and the customer is happy. Thanks to everyone. Dave Trouble codes: B0827 (Traction control diode), U1000 (Serial communication class 2), B1000 (ECU Malfunction).
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