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Prev Professional Automotive Repair Technical Discussions for February 28, 2011
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1995 Chevrolet Blazer 4.3L No Start VIN: 1GNCT18W5S
Vehicle originally came in with a no start problem that only occured when vehicle was shut down after driving.After shutting vehicle down for 1 hour and sitting with engine off it would crank but no start.We found no injector pulse from VCM to injector spider....
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1996 Chevrolet C2500 6.5L Stall, Misfire, MIL Lamp on VIN: 1GCGC29FXT
Thanks in advance for all help. I dont know where to go with this problem as I am unable to duplicate the P0251 in the shop. The P0275 has a 3-1 fail rate I.E. Fail count 12 pass count 4 in fail records. The P0251 occurs primarily cold but only occasionly, Veh... Trouble codes: P0251 (Cam reference signal missing), P0275 (Cyl. 5 balance out of range)
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2000 Chevrolet Suburban 1500 LS 5.3L unknown VIN: 3GNFK16T9Y
The Suburban has had a hard life. Pretty rough all the way around. Found alot of missing nuts and bolts underhood and under car. Anyway the main complaint now that the growling of the left front bearing is repaired is a thumping noise underneath on the left si...
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2000 Chevrolet C6500 7.4L Burned up connectors VIN: 1GDJ7H1D6Y
Truck came in for maintenence issuse. We found check engine lamp on and the Crank, Knock and Right 02 sensor connectors all burnt up. Truck runs fine. Before we call the customer we wanted to find out why there are burned up connectors on these sensors. Unsure...
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2002 Chevrolet S10 2.2L Shift SOLENOID VIN: 1GCCS19522
When started, vehicle shifts through gears untill you slow down then computer goes to failsafe third gear only per code. Restart and same thing again. Truck will only set the one code. P0758,2-3 shift solenoid circuit. Removed pan,hooked up modis.ssa and other...
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2004 Chevrolet Colorado 3.5L Misfire VIN: 1GCDT136X4
This vechile misses on #3 at idle only. tried a new coil and plugs no difference so we did the exhaust valve springs and seals per TSB. No difference, still misses on #3. I have since heard rumours of bad heads. Any ideas. Trouble codes: P0300
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2005 Chevrolet Malibu 2.2L Poor Idle Quality, Surge, Stall VIN: 1G1ZS54F85
Replaced fuel pump in car 10/29/10 for a no start with a ac delco assm the car came in 2 months after with gas smell and rough idle some times. Found line to purge valve with liquid gas in it pulled tank down to access canister and it was full replaced caniste... Trouble codes: B3109 (Key less entry low battery), U2122 (Lost comm w radio)
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2005 Chevrolet Express 3500 6.0L Steering VIN: 1GBJ631U15
Some with a clue. The vehicle steering: Front end shakes violently sometimes at 45 to 50 mph on slight left turn. Maybe something is bent based on S.A.I.?
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2007 Chevrolet HHR LS 2.2L fuel gauge VIN: 3GNDAZ3D47
Hey I replaced fuel pump in HHr for a hard to start problem starts good now but fuel gauge doesnt work , the new pump from GM came without sender? I called dealer they said was the very few that does not come with sender?So we switched sender to new pump , did...
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1999 GMC Yukon Denali 5.7L evo/passlock VIN: 1GKEK13RXX
this vehicle came to us as a start & stall.I started my diag with map codes and found that the vcm would not respond to changes in map voltage when manually appling vac. to map sensor.with dvom at signal return wire at vcm voltage dropped as vac. increased ind...
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2006 GMC Sierra 1500 HD SLE 6.0L MIL Lamp on VIN: 1GTGK13U56
customer had code po101 stored so he replaced mass air flow sensor and cleared code. code came back with two other codes. po171 and po 174 left and right banks fuel trim lean. we hooked up scan tool and tried to clear codes. codes would not clear. found air in... Trouble codes: P0101, P0171, P0174
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1995 Oldsmobile Aurora 4.0L Unknown VIN: 1G3GR62C4S
hello everyone hoping for some help here. this vehicle came in with the left front wheel and right rear wheel locked up. replaced both hoses and released the wheels. now we bled the brake system has good pedal vehicle off. test drove it and pedal will go to fl...
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2000 Oldsmobile Alero GL 3.4L keyless entry VIN: 1G3LN52E8Y
When car was new, it did not have keyless entry. GM dealer installed a GM dealer installed keyless entry system. Customer recently lost a key fob and we got her a new one. Part #[...] it looks almost identical to a factory fob except it also has a button wi...
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2002 Oldsmobile Aurora 3.5L oli leak out of back valve cover VIN: 1G3GR64H12
hi i need help .oli leaking out of back valve cover . new valve cover and new gasket two times and still leaking . please help if u can . could the head be crack
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Fixes & Summaries for GM
Fix/Summary Answers
2001 Buick LeSabre Limited 3.8L Cuts out VIN: 1G4HR54K51
Thanks for everyone help on this one, .I had replaced the MAF, TPS, & MAP with new ones and tested the old and new with my modis (I know new doesn’t mean good) still stalling with code P0101.My dad was trading in his 1999 Monte Carlo with a 3.8 that ran fine s... Trouble codes: P0101.
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1998 Chevrolet Blazer 4.3L starts and dies VIN: 1GNDT13W5W
As of this time i have not heard back from customer, since they took vehicle to the dealership. Within a week after posting help request, customer had blazer taken to dealer. With help from another tech, every thing was tested. We were down to a bad body contr...
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2000 Chevrolet Silverado 1500 5.3L belt noise VIN: 2GCEK19T6Y
As some of you suggested I replaced the water pump and the noise is gone I guess it was not the belt but the seal in the water pump, everything works good, customer is happy and thats what counts. Thank you guys for all the help.
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2003 Chevrolet Impala LS 3.8L Dead battery VIN: 2G1WH52K93
WELL THIS WAS A EDUCATIONAL EXPERIENCE WHEN YOU WOULD GO IN WITH THE TEC2 IT SHOWED THE POWER MODE AS OFF BUT AWAKE YOU COULD GO INTO ALL BODY MODULES WITH THE KEY OFF AND NO FUSE WOULD MAKE THE DRAW STAY OFF RAN OUT OF THINGS TO UNPLUG BUT FINALLY UNPLUGED TH...
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2007 Chevrolet Impala LT 3.5L Temp Guage VIN: 1S15DKHJUE
thanks to all you great technicians i got this rig fixed. replace the t stat and all is well.some one had previosly been in there and drill a hole in the t stat
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2003 Saturn Ion-1 2.2L Stall, MIL Lamp on VIN: 1G8AW12F13
Thanks for the replies on this one, I guess the PCV is an integral part of valve cover?? Car did return again with severe moisture again in air intake tube & milky in v/c, not low on coolant, advised customer of need for further diagnosis, he declined any fur... Trouble codes: P0106 (MAP sensor fault), P1599 (Engine stall).
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