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Prev Professional Automotive Repair Technical Discussions for April 9, 2009
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Open Help Requests for GM
Help Request Answers
2001 Cadillac Seville SLS 4.6L TCC circuit VIN: 1G6KS54Y71
Hi folks - I have a seville SLS here that is about to undergo it's second replacement of the TCC solenoid in 6 months. The car is driven on freeway most (90% of the time). First time it came in it is described in repair history. Car did great until about 1 wee...
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1992 Chevrolet C2500 Cheyenne 6.5L Engine oil leak VIN: 1GCGC24F1N
Customer has complained of leaking oil. He says one day it leaks and another day it doesn't. It is a work truck that is used to pull heavy loads at times. I do not work on many diesels. cleaned off most of the engine it was very oily, especially on the drivers...
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1994 Chevrolet K1500 4.3L clutch VIN: 1GCEK14Z0P
howdy & thanks for your help, customer complained of stiff clutch pedal, brought his own clutch kit & slave cyl, & we installed them along with a new front brg retainer. clutch pedal was still stiff so we installed a new clutch master cyl & pedal is still very...
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1995 Chevrolet C2500 Cheyenne 6.5L Poor Idle Quality VIN: 1GCGC29FXS
Now engine is replaced vehicle still has same problem. You step on throttle and engine goes up to 5000 rpm and stay there untill computer shuts it down or key is turned off. scan data for injector pulse width is 1.95 koeo 2.20 koer. NO matter how fast engine r...
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1996 Chevrolet Monte Carlo LS 3.1L Low Coolant Light VIN: 2G1WW12M4T
Replaced radiator,cap,upper & lower & bypass hose,intake gaskets.When car came in it was just for a coolant leak there was no low coolant light problem before rad replacement.Replaced radiator,hoses&cap.Car came back with low coolant light on. Coolant was not ...
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1996 Chevrolet Tahoe 5.7L abs VIN: 3GNEK18R5T
Vehicle came in for ABS light on and needed brakes front and rear. Check for codes found codes C0025 and C0026 Left front wheel speed sensor. Replaced wheel speed sensor, pads and rear shoes. Left wheel speed sensor was open when we checked the resistance. Roa...
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1999 Chevrolet Tahoe 5.7L Hesitation, Surge, Cuts out VIN: 3GNEK18R1X
I have this 1999 Chevy Tahoe, 4x4, 5.7L, csi vortec, when the engine is cold will ,first start up,surge, hesitated and misfire under load for a few minites then clear up and run good. When it is acting up, I can add propane to intake, and engine clears up and ...
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2001 Chevrolet S10 4.3L Hesitation, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GCCS19WX1
Replaced crank sensor and checked wiring to computer all checked out ok Noticed that losing square at the top of waveform when rpms go over 2000 does this as you start to hear slight engine knock Trouble codes: P0335
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2001 Chevrolet Silverado 2500 HD 8.1L turn signals VIN: 1GCHK24G21
This truck came to us the other day with the signals working very fast on both sides. We found the flasher to be the problem. We installed a gm flasher and every thing was great. Well after severals days the customer returnes and states that the following is h...
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2002 Chevrolet Silverado 1500 5.3L 4x4 VIN: 1GCEK19V62
Front driveshaft is beeing turned all the time by the transfercase. have pulled off motor, and moved shifter lug with a wrench still will try to turn the front yoke. Have dissasembled t-case and can not find anything wrong, fork appears good. clutches all look...
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2003 Chevrolet Silverado 1500 5.3L MIL Lamp on VIN: 1CE1933Z21
Hi fellow techs I,m looking for any input on this chev. Initially the vehicle came in with a rough idle and mil light on.Upon further investigation we found the intake gasket had a vaccuum leak which caused a number of related codes.While repairing the intake ... Trouble codes: P0332, P0430
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2003 Chevrolet Impala 3.4L Lighting VIN: 2G1WF52E03
DTC U1000 Class 2 Communication Malfunction DTC U1016 Loss of Communications with PCM DTC U1064 Lost Communications with BCM DTC U1096 Loss of Communications with IPC Battery run down protection relay clicks. Retained accessory power relay clicking Head lamp...
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2003 Chevrolet Trailblazer North Face 4.2L Misfire, MIL Lamp on VIN: 1GNDT13S63
Hi folks,I've got this low mileage 4.2 straight six with an intermittemt misfire on #1 only. Found a bulletin about water intrusion, and sure enough #1 was full of water,so I replaced coil and plug, and installed new cowl seal to redirect water runff. A week l... Trouble codes: P0301
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2004 Chevrolet Malibu LT 3.5L Pretensioner VIN: 1G1ZU54854
This '04 Malibu was bought at an auto auction, by my customer. The car does not look like it has been repaired by a body shop, or had any paint done. There where 4 codes when the car showed up B0015, B0022, U2103, and B1325. B0015 and B0022 are LF and RF Prete...
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2007 Chevrolet Impala LT 3.9L tpms system VIN: 2G1WC58R67
Hi to all. This car first came to our shop 10 / 2008 with 47000 miles. The car needed new tires. They were original worn out and leaking air. The customer at that time told us that the tire pressure system had been acting up and displaying the dash message tha...
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1990 Geo Tracker 1.6L 1-2 shift VIN: 2CNBJ18U3L
Hi; I have a 90 tracker with an automatic trans. In the morning when first started, it wont shift out of first and if I give it too much gas, it will go into neutral. Also the power brakes don't work to good for about five minutes. It is like the vacuum boost...
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2005 GMC Yukon Denali 6.0L hydroboost ? VIN: 1GKEK63U75
this 2005 denali came in with customer complaint of squeaking when going down the road and moving the steering wheel. squeaking is low volume and during chasedown, found that when brake applied, louder version or noise accurs. i suspect hydro-boost issue and t...
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2002 Oldsmobile Silhouette Premiere 3.4L park assist VIN: 1GHDX13E12
This van has an inop. park assist, every thing we test seems to be fine. I dont completly understand the diagnostic chart i guess because my light dont flash any thing on the chart. It starts diag. mode with both outer lights on solid, then 4 middle amber flsh...
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1999 Pontiac Bonneville SE 3.8L engine VIN: 1G2HX52KH2
This guy is determined that this car is causing the engines to go bad. I told him it is probably just bad luck that is a risk you take when you put used engines in. We checked everything related to driveability concerns. Also checked TSB'S could not find anyth...
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2001 Pontiac Grand Am SE 2.4L engine VIN: 1G2NF52T51
swallowing my pride with my first help request... vehicle was towed in as a "no start". scanned for codes, none stored but noticed during cranking my cam signal was coming and going. ( spark and pulse along with it) tried cam sensor. same thing. tried a coil t...
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Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick Regal 3.1L Hesitation VIN: 2G4WB54T5P
tryed doing the relearn procedure. didn't seem to help. did fuel induction service for intake and fuel rail. did another relearn by disconnecting battery then letting it run in drive then shutting off. seems ok at this time. customer called back after 2-3 week...
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1997 Buick LeSabre Custom 3.8L Stall VIN: 1G4HP52K4V
THANKS TO ALL THAT REPLIED. OVERWELMING RESPONSES OF FAILING CRANK SENSOR. WE HAVE NEVER GOT VEHICLE TO FAIL,DEALER HAS HAD ALL REPAIRS. CUSTOMER WILL BE IN FOR "RECOMMENDED" CRANK SENSOR REPLACE WHEN HE SAVES SOME $$...
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1998 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52K9W
The fuel trims were ok ,o2 sensor checked out ok, smoke tested intake & exhast systems no leaks. load tested [...] wires with headlight. added extra ground to o2 sensor case.,all good. Replaced pcm with dealer part, programed and all is ok. Thanks for the ... Trouble codes: P0133 (o2 sensor slow response).
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1966 Chevrolet SUBURBAN 350CID starter VIN: C1466S1411
WOW! RESPONSES STILL COMING IN! CANT THANK EACH OF YOU BUT THANKS TO ALL! THIS TRUCK IS FIXED. SOME OF YOU STATED THAT IT WAS POSSIBLY THE WRONG STARTER. IF YOU DID YOU WERE CORRECT. WHEN I ORIGINALLY REPLACE THE STARTER (CAUSE IT WAS NOISY & SHIMMING DIDNT HE...
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1989 Chevrolet C1500 Cheyenne 5.7L MIL Lamp on VIN: 1GCD614K6K
THANKS FOR ALL THAT REPLYED! I FOUND THAT THE WIRE FROM THE COMPUTER TO THE O2 SENSOR HAD HIGH RESISTANCE.IT TRICKED ME BECAUSE IT HAD CONTINUITY. I RAN A NEW WIRE AND EVERYTHING IS WORKING CORRECTLY! THANKS AGAIN FOR THE PEOPLE THAT REPLYED! JEFF [...] Trouble codes: 13 (o2 short open circuit open).
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1998 Chevrolet C1500 Cheyenne 5.0L Misfire, MIL Lamp on VIN: 1GY3T46M2X
Turns out the distributor was not installed correctly. Got a dozen responses about making sure cam retard was set at zero and plus two...a few told me how to find it on the scanner..and a few added the procedure for it... You guys are great Truck running good... Trouble codes: P1345 (Crank/Cam sensor), P0301.
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1999 Chevrolet S10 LS 4.3L No Start VIN: 1GCDT19WXX
Sorry for the long wait for a reply. This customer was from out of town . He felt more comfortable towing the truck back to his local shop. I asked him to call me with the fix but he never got back to me. That's the reason for the long close time. Thanks for a... Trouble codes: B2973 (Cant find a code definition. I think driver door switch.).
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2000 Chevrolet Tahoe LT 5.3L Unknown VIN: 1GNEK13T2Y
Thanks for all who replied, Ended up checking solinoids all tested good, Futher diag found to be internal damage removed trans installed new cluthes and seals reinstalled checked ok thanks again have a good day
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2003 Chevrolet Trailblazer North Face 4.2L no communication VIN: 1GNET16S03
first of all thank you guys for all of the interest in helping me with this problem, however the fix actually was something nobody guessed. there is a flex circuit board at the bcm and i found a hair line crack in it. fixed the circuit and relearned the comput...
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2005 Chevrolet Silverado 2500 HD 6.6L reverse VIN: 1GCHK29205
HE HE Ha Ha Boss (Dad)was getting nervess so we sent it to a local dealer/The dealer brove it into their shop and then took it for test drive with no problem.Had to be air locked and iam asuming that the roll back put enought angle on it to get to brupp.Thank...
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1992 GMC K1500 Sierra SLE 5.7L Cuts out VIN: 2GTEK19KXN
After looking at the majority of replies I recieved, I decided to go after the pickup coil and magnet in the distributor. That was the ticket! The vehicle runs perfect. It does not cut out at all. Thank you all again for your valuable time!
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2003 GMC Sierra 1500 SLE 5.3L transfer case? VIN: 2GTEK19T73
Thanks to all for their help;very good information on this truck. The fix was,as suggested,to change the transfer case fluid and tell customer to match tires sizes. I was amazed what a difference that changing the fluid made;it's quiet now!
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1998 Pontiac Grand Prix GTP 3.8L Cuts out VIN: 1G2WP5215W
so far, so good. found tech had installed large paper clip originally to get car out of shop after testing. tightened up female terminals to resistor connector and car has been good for about two weeks now. thanks for all the help.
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1999 Pontiac Montana 3.4L Transmission VIN: 1GMDX03E6X
Took a chance and changed the PC Solenoid valve. The line pressure was off at 0 amps but ok at .1 amps so I thought this would be a good starting point. This did not change even after changing the solenoid. The pressure was still only 90 psi at 0 amps and acco...
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2004 Pontiac Vibe 1.8L MIL Lamp on VIN: 5Y2SL62814
The vehicle has been gone with no check engine light. We replaced the oxygen sensor for the third time and it seems to be the charm. And yes they were all oem. Trouble codes: P0133 (slow response oxygen sensor).
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2005 Saturn Ion-1 2.2L lack of power VIN: 1G8AF54F15
Thanks for the replies. I could never get this car to act up, however the throttle postiton sensor flashed to 30% one time while at idle. I replaced the throttle body and did the relearn. (key on for 10 sec and key off for 10 sec, then start) After replace... Trouble codes: P0101 (MAF out of range), P0106 (MAP or BARO out of range), P0171 (System too lean), P0300 (Random cylinder misfire), P0506 (Idle Control System RPM too low), P0068 (MAP/MAF-Throttle Position Airflow Correlation).
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