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Prev Professional Automotive Repair Technical Discussions for November 29, 2007
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Open Help Requests for GM
Help Request Answers
1993 Cadillac Eldorado 4.9L light ride control VIN: 1G6EL12B3P
HI Y'ALL!!! I have a real headache with this 93 eldorado. The service ride control light keeps flashing and I am chasing my tail now. The only code that I can find is I039 in the IPC section. That leads me to the speed sensitive suspension module in the trunk....
1997 Cadillac Catera 3.0L airbag light VIN: W06VR52R8V
Does anybody know of a scanner that will access the srs systems on a cadillac cater? I have a genisys and it doesn't list in the srs section. thanks
2000 Cadillac Seville STS 4.6L power window VIN: 1G6KY5494Y
good morning cadillac techs.i have very little experience on these cars and here is my problem.the left rear power window does not work from the drivers door switch but it works from the left rear door switch.it will go up from the drivers door switch but it w...
2003 Cadillac CTS 3.2L No Start VIN: 1G6DM57NX3
Will not start, sets code P0335 every second crank. Installed-crank sensor, computer, ran wires from sensor directly to PCM, inspected tone ring. I get over 2V AC from crank sensor while cranking, only spec I can find is 4-5V AC @ idle. Does have a wave patter... Trouble codes: P0335 (crank sensor)
1988 Chevrolet C1500 Cheyenne 5.7L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 26CFK24K9J
Okay heres a prime example of when a good job goes bad. Originally this vehicle was driven for like 50miles after a jump start.. then wouldnt start again for customer at a gas station. So it was towed in no crank nostart. Turns out battery was dead and termi...
1990 Chevrolet C1500 Cheyenne 5.7L Excessive Emissions VIN: 1GCDC14K2L
Hello all, I've hit a wall. This is what I've got, hold the throttle at 2000rpm, o2 volts go to .030 sometimes less. Scan data shows integrator at 128, block learn at 117, coolant temp 185f, CLOSED LOOP operation, 1.5ms injector pulse width (checked with lab s...
1993 Chevrolet C1500 Cheyenne 4.3L Pedal Travel VIN: 1GTEC14Z9P
Hello & thanks in advance, This p/u came in with the brake pedal going to the floor. The owner had replaced the master cylinder himself and the problem was still there. I rechecked his installation and did another brake bleeding. The pedal still went to the f...
1995 Chevrolet K2500 Cheyenne 6.5L Surge, Cuts out VIN: 1GCGK24SXS
Truck has been to dealer several times. It has a surge type symptom under light accel from 45 mph. You can duplicate it every time. Accel to 45, back out of it, the lightly accel. It feels like a gas vehicle with a bad plug wire-it jerks like an ignition miss ...
1996 Chevrolet Lumina 3.1L Sarter, and charging system VIN: 2G1WL52M35
hi all, thanks in advance for your help on this one. i generally do very good with just about any electrical problem, but this one's got me stumped.(and i fear it's going to be something incredibly stupid i should've seen) about three weeks ago, i replaced the...
1996 Chevrolet Corvette 5.7L No Start, MIL Lamp on VIN: 1G1YY32P8T
The car will crank with no spark for about 20-30 seconds.After it fires it starts right up runs fine.Shut it off and start it right back up it runs fine. Let it set for about 10 seconds it cranks for about 20-30 seconds before it fires and runs.Sets code istan... Trouble codes: P0372
1996 Chevrolet Tahoe 5.7L gauges VIN: 1GKEK13R3T
after we put every thing back together, when you turn the left signal on,, the bright lite and all the gauges blink and pulse with signal. the custermer told us that the interiour lights stuck on and would not shut off, i pulled the switch panel and found burn...
1999 Chevrolet Tahoe 5.7L rear brakes VIN: 1GNEK13ROX
hello all , i have a 1999 tahoe problem is rears lock up, overheat drums and cracks the rear shoes, i have replaced shoes cut drums and replaced all hardware, 2 weeks later same problem replaced drums and shoes again then 2 weeks later same problem, put bonded...
2001 Chevrolet Silverado 1500 HD LS 6.0L shift ind VIN: 1GCGK13U91
We have this 01 k1500 with the shift indicator not displaying in the dash. scan data is showing all gears. There are no codes. What could the problem be?
2001 Chevrolet Monte Carlo LS 3.4L no fans VIN: 2G1WW12E21
customer brought in car for overheating. fuse was blown for relay #2. replaced bad cooling fan motor, relay and fuse. after repair proceded to test cicuit by allowing engine to warm up. temperature sensor rose to 244 degrees before i turned off motor. the pcm ...
2002 Chevrolet Impala LS 3.8L transmission VIN: 2G1WH55K22
Vehicle surges from 40 to 70 mph under light accleration.Checked for service codes and have found none.Checked sensor data on scantool and found the mass air flow,map,ignition timing,and egr systems fluctuate with surging.Have replaced mass air flow,and thrott...
2003 Chevrolet Malibu 3.1L harsh upshift VIN: 1G1ND52J43
Vehicle came in with harsh 1-2 upshift. No codes were present. Trans fluid was full. Flushed trans with no luck. Tested Pressure Control solenoid, was about 5-10 psi low across the board. Removed valve body to replace PC solenoid. Found an isolator spring miss...
2003 Chevrolet Blazer Xtreme 4.3L Poor Fuel Economy VIN: 1GNCS18X83
replaced coolant sensor & cleared codes(po128) two days later sends code po101 for maf clear codes & drive for a month. po128 for coolant sensor comes back on replace coolant sensor & clear codes again. two days later again code po101 for maf Trouble codes: P0101, P0128
2006 Chevrolet Impala LT 3.5L MIL Lamp on VIN: 2G1WT58K36
Car came shifing hard with the check engine light on. It had a PO171 lean code. The long term fuel trim was fixed at 19.5%. The MAF sensor would change is reading at idle intermittently. The car would also reset the lean code within a couple minutes. I have ne... Trouble codes: P0171
2006 Chevrolet Colorado LT 3.5L left front turn signal VIN: 1GCD1196X6
I am having trouble with the left front turn signal inop. I removed the bulb, and the socket and contacts on both seem to have gotten very hot. I bent the terminals on the socket closer together to get a better connection, and also coated the connection with d...
2000 GMC Jimmy SLE 4.3L No Start VIN: 1GKCS13W8Y
it normally starts after putting fuel,propane in eng. it runs all day, next morning the same, i suspect fuel meter body is defective,if you have an idea let me know. thanks
2003 GMC Envoy XL SLE 4.2L Hesitation, Surge, Cuts out VIN: 1GKET16573
Hello all again, I'm desperate this time(as always I guess). This envoy very intermittently acts up and when it does there is no response from the throttle pedal (engine just idles) and the (I believe it to be) low power light comes on. This can be corrected i... Trouble codes: P0495 (Cooling fan speed high), P0172 (System rich Bank 1), P0705 (Trans Range Circuit), P1221 (TPS Performance/Fuel Pump Circuit), P1271 (APP Sensor 1-2 correlation error), P1523 (Electric throttle control throttle return)
2000 Oldsmobile Alero GL 2.4L Misfire VIN: 1G3NL52T9Y
hello, this is the story... the car came in 4 months ago running very poorly ... misfiring code po300, felt like was running on 2 cylinders. without testing anything our initial inspection revealed all original ignition components. replaced all secondary ignit... Trouble codes: P0300
1994 Pontiac Firebird Formula 5.7L cooling system VIN: 2G2FV22P4R
my question is i have this trans am that will over heat idling but as soon as you get going it goes back down i think only the low speed fan comes on but if i use the scan tool the high speed fan will come on what am i missing can anyone help please
2002 Pontiac Grand Am GT 3.4L Surge VIN: 1G2NW52E12
Hello everyone. The customer complaint is surges under light accel between 30mph and 50mph. It feels like the transmission is hunting to stay engaged fully. The problem only occurs under very light accel when the engine is lugging. If you accelerate to hard i...
2003 Pontiac Grand Am GT 3.4L all dash waring lights VIN: 1G2NW12E93
Hey folks I need HELP. Have an 03 grand am gt while driving the abs, brake, trac off, warning lights come on and the battery goes dead. Has new battery. I have replaced the alt 3 times (all same day) can not get over 12.5 volts charging. The orginal alt had ba...
2003 Pontiac Aztek 3.4L abs VIN: 3G7DB03E83
car came in a couple weeks ago for abs light and awd disable light on. c0051 r/r range performance. she had taken car to another shop where she works(180 miles away)and they relaced r/r hub. i scoped both rears unplugged at the sensor and they were the same. c...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Cadillac DeVille 4.9L ride control VIN: 1G6CD53B3P
We got the 93 caddy back in today to put regular gas struts on. Thanks to Ted from the great state of texas and from Paul from My home state of Mi. Unhooking the module under the seat worked fine. The customer put 450.00 in his 800.00 caddy but he won't b...
2000 Cadillac Catera 3.0L lifters VIN: W06VR54R3Y
2001 Cadillac Seville SLS 4.6L Instrument clus VIN: 1G6KS54Y91
Well the two replies were right. We disconnected the battery for 15 minutes than before reconnecting touched positive and negative cables together. Reconnected and started car all was well again. Only had a security light on so I just cycled the key fob lock a...
1990 Chevrolet Corvette 5.7L No Start, Poor Idle Quality VIN: 1G1YY2382L
1992 Chevrolet S10 Blazer Sport 4.3L Poor Idle Quality VIN: 1GNDT13Z2N
Thanks for all the help on this one the fix was the egr silonoid opening up on cold start. * thanks again to all
1998 Chevrolet Lumina 3.1L MIL Lamp on VIN: 2G1WL52M2W
Thanks to all that responded. Your suggestions were right on. I didn't get all of the carbon out of the passage when I cleaned it the first time. I used the speedo cable and a drill along with some good carb cleaner. That broke loose a chunk of carbon about th... Trouble codes: P0401 (insufficent egr flow).
2001 Chevrolet Astro 4.3L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1GCDM19W11
I did not get van fix. I tried every replies that would apply to this van. There are some that did not pertain to this system. But after crank sensor replaced and shimed, timing chain, new timing cover, 2 fuel injections cleaning, new intake gasket, cap, rotor... Trouble codes: P0300 (Misfire), P0335 (Crank Sensor).
2004 Chevrolet C5500 Kodiak C5C042 6.6L No Start VIN: 1GBE5C12X4
Thanks for all the help I got.Virgil from Michigan: I found the spot that you were talking about...the plastic cover and insulation were worn just like you said but it had not reached the wires yet! I did protect the area and re-positioned the harness so I don...
2005 Chevrolet Express 3500 6.0L No Start, MIL Lamp on VIN: 1GCHG35U75
hello i am going to close this one , found broken rod cap on # 6 cylinder got in and chewed up rod then chewd up reluctor wheel , hence the timing issue , popping thorugh intake anyway it need a NEW ENGINE thanks for your suggestions Trouble codes: P0336.
2001 GMC Sierra 2500 HD SL 6.6L No Start VIN: 1GTHK23131
thanks again guys changed all 8 injectors primed system starts perfect every time thanks again.figured it out by installing aclear line in the fuel feed and afuel pressure guage
1999 Oldsmobile Silhouette Premiere 3.4L turn signals VIN: 1GHDX03E5X
Thanks everyone!! Sorry for the delay. The customer was busy and living with intermittant flashers. The flasher module was exactly where you all indicated. It was obscured by a harness and being solid state, of course it didn't make any noise to help locat...
2006 Saturn Ion-2 2.2L battery VIN: 1G8AZ55F96
awesome advise...the problem was the pass/lock system. after reading the responses we contacted the customer for more info. although they were not able to describe exactly what was happening, they gave us just enough info to confirm that the problem was not a ...
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