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Prev Professional Automotive Repair Technical Discussions for January 14, 2008
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Open Help Requests for GM
Help Request Answers
1987 Cadillac Eldorado 4.1L information center VIN: 1G6EL118XH
i was wondering if any gm mechanics could tell me what the engine hot light means in the information center.doesn't matter if engine is cold or hot.radiator fans work.coolant level good.
1995 Chevrolet Corsica 3.1L No Start, Stall VIN: 1G1LD55M6S
hello every one have a strange one here. it will fire every time you crank it but stalls with in 2 seconds, you can hold gas pedal down and it will run on 3 cyls. the noid light will be dead on three of them.I am loseing injector pulse on injectors some times ...
2000 Chevrolet Cavalier LS 2.2L abs VIN: 1G1JF5241Y
I have this cavalier that intermintant sets the ABS light,I have drove this vehical sevral times and could not duplicate the problem.Also ran it through sevral ABS stops and could not find any thing.It sets three codes a C1225 LF variation,a C1232 LF open or s...
2000 Chevrolet Silverado 1500 5.3L brake lights VIN: 2GCEK19T6X
I have this K1500 and the brake lights donot work. The turn signals and tail lights work and the wiring for the factory trailer connector works. I have power to the fuse box connector but I dont seem to get anything out to the brake lights. Do these things hav...
2001 Chevrolet Express 1500 5.0L No Start
i am trying to help out a friend at another shop.he has a 01 gmc 1500 van with a 5.0l.when the vehicle is cold it will not start unless fuel is sprayed into throttle body then it starts and runs fine.if you shut it off it will restart but if you let it sit for...
2001 Chevrolet Venture LS 3.4L Fuel gauge, temp gauge VIN: 1GNDXO3E91
Code U1000 Class 2 serial communication problem (hard code). Radio is locked, fuel,temp gauges and infocentr inoperative. Idle is very low. Alternator would charge under acseleration about 15V.
2002 Chevrolet Silverado 1500 4.3L not known VIN: 1GCEC14W62
OK Fellow Techs I'm at my witts end. Truck came in for the usual 4.3 problem intake leak coolant in the oil,and front timing seal leaking. Routine job have done several. hear is my problem. we finished the job and the tech started the truck up. right from the ...
2005 Chevrolet Silverado 2500 HD 6.6L turbo VIN: 1GTHK23215
codes 2563, 2564, for turbo vane position, position sensor seems to be ok, have done turbo relearn procedure in scan tool, updated pcm for applicable re flash info (was on a tsb), same issue, truck has no power what so ever, erase code and comes back minute dr...
2001 GMC Sierra 1500 SL 5.3L MIL Lamp on VIN: 2GTEC19T91
Previous shop installed new o2 sensors, I verified that the correct banks got replaced. I got slow response from the MAF sensor, found that customer had installed gauze style air filter & had not oiled it, maf sensor was dirty, installed new maf sensor, new ai... Trouble codes: P1133 (b1s1 insufficient switching), P1153 (b2s1 insufficient swiching), U1041 (loss of ebcm/ebtcm communications)
2001 GMC Sierra 2500 HD SL 6.6L Water pump VIN: 1GTHK23141
Thanks in advance this is my first post. Came in engin wont get warm replace tstats with new from dealer, test drove seemed fime. Came back with slow to warm up no heat from heater. Found no flow of coolnt to heater at idle. above 1500 rpms ok. Driving down hi...
2002 GMC Envoy SLE 4.2L lft. turn signal VIN: 1GKDT13592
Customer had vehicle towed in to shop because of a no start condition. Vehicle would not crank over but had ignition and good battery. After we had pushed the vehicle into the shop and tried starting it of course it started and we have not been able to simulat...
1983 Oldsmobile Cutlass Supreme Brougham 5.7L wait light VIN: 1G3AM69N3D
Vehicle came in with a charge light on. Tested and found alternator not charging. Replaced Alternator. The wait light now comes on(key on) and after 12 sec(cold), will turn out and immediatly turn back on. At that point, you are able to start the vehicle norma...
1999 Oldsmobile Aurora 4.0L No Start VIN: 1G3GR62C5X
This car has a hard start /long crank after sitting over night .It acts like a bad fuel pressure reg. With return line pinched off it will start fine & hold pressure.this low milage car runs well with no codes. I pulled up rail& injectors to check for leakage....
1997 Saturn SL2 1.9L Misfire VIN: 1G8ZJ5279V
we a tune up on this car and cleared all codes on 1-7-2008 had customer drive car for three days and no monitors had run,we have had the car for three days and we cant get any of the monitors to run either, all data on scanner looks good ,any help Trouble codes: P0300 (random mifire)
2000 Saturn SL2 1.9L starting VIN: 1G8ZK5279Y
Hello everyone, This saturn cranks no start 2-3 times then starts up no problem, this happens about once a day, also It had a evap code present(not related) but when I tried to erase the code my scanner says ENGINE RUNNING can't clear code, even though the car...
2002 Saturn SC1 1.9L No Start VIN: 1G8ZP12812
the car has a no start problem that only happens once in a while. i have only got the car to act up twice. the owner has had the car towed three times. when i check the car after it is towed in it starts. when the car acted up on me, the fuel gauge did not mov...
2007 Saturn Sky 2.4L air bag VIN: 1G8MB35B27
while driving passenger air bag will turn off. it was very intermittant but now happens more often than not. have tried moving or changing positions in seat. saturn now tells me this is normal and its the way it is. my wife weights about 125 lbs. and has an am...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick Park Avenue 3.8L initial shift VIN: 1G4CW52L9R
Thanks for so many(23) helpful replies! Most of the replies seemed to indicate that the p0705 code & the shift problem(not going into gear)are two separate problems. One will probably require replacement of the range switch,& the other indicates internal prob...
2003 Cadillac Escalade ESV 6.0L heated seats VIN: 3GYFK66N13
After pulling seats out I found the heater elements melted . replaced elements and everything if fine.thanks to all that helped
1994 Chevrolet Corvette 5.7L No Start, MIL Lamp on VIN: 1G1YY22P2R
thanx for all the help i did put new opti spark in vehicle and bam its done ! i just cant believe it was just installed 2 yrs ago and bad again sounds like alot of cash for only 2 yrs ...thank you mike goodbrakes automotive and more phoenix az Trouble codes: 36 (low / hi resolution pulse in distributor), 42 (short in ign system).
1996 Chevrolet Cavalier 2.2L Cooling fan VIN: 1G1JC1240T
I would like to thank every one for their suggestions. When the car came in it was 60 degrees out side and engine was getting over 230 no problem with no fan. After we replaced the ecm it had dropped the out side temp to below 30 degrees and has hard to get en...
1996 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GCEK19R4T
hi guys, well, as i thought it was, the lower intake gasket was bad. as i mentioned in the original post, i had 15" of vacuum in the oil dipstick tube with the breather and pcv both unplugged and blocked. a couple things i forgot to test though, that you guys ... Trouble codes: P0141 (ho2b1s2), P0161 (ho2b2s2), P0307 (cylinder 7 misfire), P0441 (evap no flow during purge), P0300 (random misfire), P0306 (cylinder 6 misfire).
1997 Chevrolet Cavalier 2.2L Engine Spark Like Knock VIN: 1G1JC1249V
Hi the piston deck height & head chamber cc's must have been different. did a compression test and it was 220lbs each cylinder. i guess that is just a little to much for pump gas. Am looking for a direct fit motor now, Thanks to all that helped.
1998 Chevrolet Venture 3.4L Cooling Systems VIN: 1GNDX03E8W
I would like to thank all the fast and knowledgeable replies, 23 in all. After reading them all you can pretty much guess that the head gasket was shot on the vehicle. The customer decided the vehicle wasn't worth going any further and we concur. He is unde...
2000 Chevrolet Cavalier Z24 2.4L Excessive Emissions, Poor Idle Quality, Surge, MIL Lamp on VIN: 3G1JF12T7Y
Thanks for all the replies, fix was a jumped exhaust cam tooth even though the vacuum was 17in at idle and compression over 200lb. Tech replies were (jumped exhaust cam tooth for 2 replies), check for restricted exhaust pipe if vacuum is lower or needle jumps ... Trouble codes: P0300.
2003 Chevrolet Impala 3.4L Mechanical VIN: 2G1WF52E63
Customer called the dealer and they will cover it under warrenty.Most of you got it right,intake gaskets leaked causing the oil pressure regulator to seize up.
2004 Chevrolet Blazer LS 4.3L fuel spit back VIN: 1GNCT18X24
thanks for all the help , tryed to answer each one as i got email --we installed new vent valve and cannister filter -gas problem is fixed, thanks for all the good solid info --joe
2004 Chevrolet Suburban 1500 LT 5.3L No Start, Stall VIN: 1GNEC16Z74
Replaced fuel pump, customer just returned from 1200 mile trip with no problems to report. We never did get the pump to act up, fuel pressure tested good, amperage was slightly high and waveform was marginally bad. We informed customer of our diagnosis and sus...
2004 Chevrolet Classic 2.2L Battery VIN: 1G1ND52F44
Well, this got ugly. I reviewed the may and varied replies several times, and before I tell you what happened, it is important to note the following: The radio has a 14-pin connector. There is no external amp. Of the 14 pins, 8 are for the 4 speakers, 2 are f...
2001 GMC 7500 7.2L Hesitation VIN: 1GDM7C1C81
well go back to basics found main fuel line from tank was pulling air made anew fuel line insalled and bled fuel system problem gone thanks
2001 GMC Jimmy SLE 4.3L starter VIN: 1GKDT13W71
So, the fix was, as 6 out of the 11 responses suggested, the neutral safety switch. After all of our testing we were leaning towards that, but we've not run into it before and were gun shy after putting in an ignition switch that didn't need replacing. We nat...
1987 Pontiac Firebird Trans Am 5.0L battery VIN: 1G2FW21F3H
Thanks to all that lent there help and knowledge, turned out this was a case of not properly checking. Turn out I had two defective item, the alternator was only putting out 10amps and the starter was drawing more than 380 amps at normal operating temp. replac...
1991 Pontiac Firebird 3.1L MIL Lamp on VIN: 1G2FS23T7M
After too many hours of going in circles, my customer very kindly stated he has a friend who has a friend at GM who made an appointment for him at the local dealer and opened a case with GM. He was very appreciative of all the time I took with his car and sta... Trouble codes: 42 (EST ckt. open or grounded).
1996 Pontiac Grand Prix SE 3.1L pass rear door VIN: 1G2WJ52M7T
Thanks for the replies, & encouragement to keep trying. Latch was not releasing, after removing panel I could reach in & feel the levers and they were moving as far as they could. The 3 P's fixed this one. persistence,patience & prayer. spent over 3 hours loc...
1999 Pontiac Grand Am SE 2.4L radio VIN: 1G2NE52T1X
2003 Saturn L300 3.0L valve train VIN: 1G8JW54R63
thanks for all the responses and thanks to those who sent torque specs i dont know why my book doesnt list that engine and special thanks to ernest and brian who nailed the problem right on. the timing belt was off 2 teeth realined put a new belt and water pum...
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