Top 10 2003 Chevrolet Avalanche Questions & Answers

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Chevy Avalanche won't start

My Chevy Avalanche won't start. It does not do anything. I've tried to jump it, checked the fuses and switched the relays. Any ideas would be appreciated.

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If you're getting no power at all when you turn the key to start, try disconnecting the battery and then hook it back up. Chevy has had some problems with an ignition relay solenoid that's mounted under the driver's side dash. Disconnecting power could reset the switch....If that seems to be it, a replacement is around $250. at a chevy dlrshp.

Posted on Feb 04, 2009

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Truck Radio/CD Player, no sound coming out of speakers

we have a 2003 Chevrolet Avalanche. I drove the truck this morning and couldn't get any sound to come out of the speakers. My husband drove it last night and he said the radio and cd player were working fine. He stated all he did was turn the volume down. The display is showing, you can hear the CD player working but there is no sound. I have checked all of the radio settings. I too have the Bose 6 cd system in my 2004 Avalanche. The stereo system works but I have no sound coming from the speakers. If I plug headphones into the rear "stereo" I can hear just fine.

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Have you check the mute mode, maybe it is in mute mode.

Posted on Jun 01, 2009

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code po650, po332,p1875 comes on what do they mean

code po650, po332,p1875 comes on what do they mean exactly,whats wrong

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CODE PO650 MALFUNCTION INDICATOR LAMP CIRCUIT MALFUNCTION CONDITIONS. POSSIBLE CAUSES MIL CONTROL CIRCUIT IS OPEN , SHORTED TO GROUND TO SYSTEM POWER,MIL CONTROL POWER CIRCUIT OPEN IN THE INSTRUMENT CLUSTER, MIL THE LAMP IS DAMAGED OR HAS FAILED,INSTRUMENT CLUSTER OR THE PCM HAS FAILED. CODE PO332 KNOCK SENSOR CIRCUIT LOW INPUT BANK 2 CONDITIONS, POSSIBLE CAUSE KNOCK SENSOR FAILED, CODE P1875 4WD LOW SWITCH CIRCUIT MALFUNCTION CONDITIONS FOR TRANSMISSIONS 4L60E 4L80E, POSSIBLE CAUSES 4WD SWITCH LOW SIGNAL CIRCUIT IS OPEN OR SHORTED TO GROUND, 4WD LOW SWITCH IS DAMAGED OR IT HAS FAILED,PCM HAS FAILED.

Posted on Mar 14, 2011

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Driver side electric seat is stuck in the far forward position and won't move. How do I move it manually or fix the motor.

I have a 2003 Avalanche. The other morning the battery was dead. Found out it was due to my drivers seat electric motor was constantly running. Got a new battery went to adjust the seat and it moved all the way forward. So close to steering wheel I can't get in. All other functions of the seat work except the forward and back function. You can hear the motor in the seat running. I have to disconnect the battery because of this. Any idea on how to move the seat manually? I would take the seat out but it's so far forward I can't get to the front two bolts. Any idea on how to fix this and move the seat. Please help. Thanks.

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Auto Repair: How to Replace a Power Seat Motor - YouTube

? 1:44
https://www.youtube.com/watch?v=EDh-0rs5Fjo
Oct 26, 2010 - Uploaded by automdvideos
Auto Repair: How to Replace a Power Seat Motor ... 2007 - 2008 Ford Expedition/Lincoln Navigator Driver Bottom Install Video ...2003-2006 Chevy/GMC Seat Cover Install 1 of 3 - eBay Ready ...2000 Ford Explorer Front Seat Track Stuck Motor Repair - Duration: 4:39. by cubmancan 4,959 views. 4:39.
Drivers seat is dead! No power seat or heat. - TheDieselGarage.comwww.thedieselgarage.com/.../96465-drivers-seat-dead-no-power-seat-hea...Mar 22, 2010 - 2003-2005 Chevrolet Avalanche, Silverado, Suburban, Tahoe 2003-2005.... Power seat on driver side didn't work.....passenger did! Neither ...DANG electric seat ' Chevy Truck Forum ' GM Truck Clubwww.gmtruckclub.com/forum/threads/dang-electric-seat.2990/Apr 27, 2006 - 10 posts - ‎7 authors'03 Tahoe My driver seat just stopped, of corse not where I need it, the ... I have a 2003Tahoe and both heated seats are not working. ... with my seat heater on the drivers seat in my 03 Avalanche, it turns ... The driver's side on my Silverado gets way warmer than the passenger side. ... Frozen New Member.Power Seat Problems?? - Tahoe Forum - Che

Posted on Dec 29, 2015

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chevy avalance brake line diagram

brake line piping diagram at brake module under the drivers seat. I'm took all the rusted lines off and where do the new lines hook up. exactly

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Left front weel wobling mechanics says it needs new roters $600

Posted on Dec 17, 2009

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Replacing Passenger Window Motor

How do you take off the passenger door for a 2003 Chevy Avalanche?

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Hello, I have a 2004 Avl. I replaced the driver door window mechanism myself. You need to pry out the electric window controls with a dull blade as to not tear the vinyl. Disconnect the controls carefully. There are small release clips that hold the switch buttons onto the electric base. Then the arm rest, there is a long screw under the armrest. At the front towards the mirror there is a long screw under a round plastic snap cover. I believe it is a small metric bolt. Next grasp the bottom end of the door cover and pull with a sharp snap. Continue around the door panel gently pulling the snaps loose from their base. The door panel cover does not cantain screws only snaps. There is a clear plastic water barrior you need to be careful to peel without tearing and place on a clean flat surface with sticky side up. I had to replace the window track and motor all in one piece, can't just replace track. I purchaces the mechanism on-line parts store.

Posted on Mar 23, 2009

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Where is oil sending unit on 2003 Chevy Avalanche

Where is oil pressure sending unit on 2003 Chevy Avalanche located

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Not sure what engine you have, most 4.8, 5.3, 6.0s are WAAAY back in the middle of the engine facing the drivers side, very difficult to get to.

Posted on Jan 10, 2010

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2003 chevy avalanche heated seats wont stay on

2003 chevy avalanche heated seats wont stay on

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The following diagnosis might be helpful if the vehicle exhibits the symptom s described in this PI. Condition Concern Driver and passenger heated seats inoperative or shut off in 30 seconds. There will be DTCs B2435, B2440, B3606 and or B1825 set in the Drivers Seat Module. The adjustable pedal position sensor, seat recliner position sensor and both heat seat thermistors share the same 5 volt reference internal to the Drivers Seat Module. A fault in any of these components circuits can make the heated seats inoperative or shut off in 30 seconds, as well as, the seat recliner and/or adjustment pedals may move in short increments when operated. A fault in heated seats, adjustable pedal or seat recliner will affect BOTH heated seats. Note Even if the vehicle is not equipped with adjustable pedals DTC B3606 still may set.Recommendation/Instructions To help isolate the area of concern use the Tech 2 and go to Sensor Data in the Drivers Seat Module. Monitor the following parameters for being out of range Recline Position Normal range .39V 4.58V Pedal Position if equipped Normal range .39V 4.58V Psgr. Seat Heat Sensor- Normal range 1V-4V Drvr. Seat Heat Sensor Normal range 1V 4V If a parameter is found to be out of range inspect circuits for any opens, shorts to ground, or voltage. If none found replace the suspect component Please be aware of the following common areas of concern The adjustable pedal position sensor internally shorted pulling the 5 volt reference low. Disconnect the adjustable pedal position sensor and see if the heated seats start working correctly, if so replace.Note Important The APP accelerator Pedal Position sensor is NOT the adjustable pedal position sensor. Make sure the correct sensor, adjustable pedal position sensor, is disconnected.The seat recliner position sensor internally shorted pulling the 5 volt reference low. Disconnect the recliner position sensor and see if heated seats start working correctly, if so replace.An open in either heated seat thermistor circuits signal or low reference The most common is the passenger thermistor where it passes through seat connector C305 pin L or K or C399 pins R or G A chaff to ground on either heated seat thermistor signal circuits. The most common is circuit 5475 black red or dark blue shorted to ground in the passenger seat near the buckle.Note Important The heated seat thermistors act differently to OPENS and SHORTS than the adjustable pedal position sensor and seat recliner position sensor. The adjustable pedals and seat recliner sensors can be disconnected for testing of the heated seats. Where as the heated seat thermistor circuit must be working correctly before EITHER heated seat will operate. Disconnecting one thermistor, which may have a concern will not allow the opposite heated seat to work correctly, BOTH side must be operational before EITHER heated seat will perate.Clearing DTCs If DTCs will not clear when using the Tech 2 after a repair has been made, try operating the device in which the repair was made. Example, if a repair was made to the passenger heated seat thermistor circuit, the DTCs may not clear unless the passenger heated seat is operated.Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed GM bulletins are intended for use by professional technicians, NOT a do it urselfer. They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

The purpose of this bulletin is to provide the technician with the following service nformation Heated Seats Switch Operation Heated Seats Switch Diagnostics Heated Seats Switch Customer Information Switch Operation The engine must be running for the heated seat feature to work. The heated seats will shut off automatically when the ignition is turned off.Two buttons, located on the door, are used to control the heated seat. Press the orizontal (RH) button to heat the entire seat, back and cushion. Press the vertical (LH) button to heat ONLY the seat back.The three light bars are an indicator of the level of heat selected for either the entire seat (horizontal button) or ONLY the seat back (vertical button) To heat both the seat back and seat cushion at the same time, press the horizontal (RH) button with the heated seat symbol one time. All 3 light bars will glow indicating the HIGH temperature etting.The horizontal (RH) button does NOT have an ON FF indicator light.Press the button a second time, 2 light bars will glow indicating the MEDIUM temperature setting for the entire seat.Press the button a third time, 1 light bar will glow indicating the LOW temperature setting for the entire seat.Press the button a fourth time to turn the entire heated seat OFF.To heat ONLY the seat back, press the vertical (LH) button one time. An ON FF indicator light over the heated seat back symbol will glow to designate that ONLY the seat back is being heated.All 3 light bars over the horizontal (RH) button will glow indicating the HIGH temperature setting for ONLY the seat back.Press the button a second time, 2 light bars will glow indicating the MEDIUM temperature setting for ONLY the seat back.Press the button a third time, 1 light bar will glow indicating the LOW temperature setting for ONLY the seat back.Press the button a fourth time to turn the heated seat back OFF.Switch Diagnostics mportant: In order to eliminate unnecessary part replacement and comeback repairs, it is essential that the appropriate diagnostic tables and aids found in the applicable manuals are followed.Verify the condition prior to making any repairs. Refer to Seats and Seat Controls in the applicable Owners Manual or this bulletin for proper heated seat switch operation information.If an improperly operating front heated seat condition exists, refer to the Diagnostic Information and Procedures in the Seats sub-section of the applicable Service Manual in order to diagnose the system accurately.When measuring the resistance of the seat heater elements, ensure the values are within the updated range of 1.5-5.5 ohms. Refer to DTC B2425 or B2430-Clearing the DTC in the Diagnostic Information and Procedures in the Seats sub-section of the applicable Service Manual.Customer Information Some heated seat components from the above listed vehicles have been returned to the Warranty Parts Center (WPC) for heat function not operating properly. Analyses of these parts show 'no out of specification condition' or No Trouble Found (NTF)Provide customers with the knowledge that if bumped, either one of the heated seat switches can be activated/deactivated accidentally.Ensure customers have a thorough understanding of how the heated seat switches function.GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

Posted on Oct 26, 2011

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where is the o2 sensor on a chevy avalanche and

where is the o2 sensor on a chevy avalanche and how many are there

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there are 2 before the converters and 2 after.

Posted on Feb 10, 2010

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gm code p2120

ses light on and reduced engine power displayed on driver info center

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Code p2120 is accelerator pedal position sensor APP sensor 1 circuit apparently this is known as the reduced engine power syndrome and is quite common on the avalanche. There is no mechanical linkage from gas pedal to throttle body and it is quite common for the throttle position sensor located on throttle body to mess up and throw this code and also for one of the wires to the throttle position sensor to get hot become brittle and sometimes break. I would start there

Posted on Aug 05, 2014

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