Top 20 2003 Chevrolet Avalanche Questions & Answers


Sluggish window operation can result from a weak motor or a dirty track. Use a child-size toothbrush dipped in water to scrub dirt out (a new one, of course, not some child's favorite toothbrush). You may find marked improvement.

2003 Chevrolet... | 137 views | 0 helpful votes


The code may apply to other parts/assemblies/systems in addition to the throttle body.

2003 Chevrolet... | 135 views | 0 helpful votes


You have a parasitic draw on the battery , Testing to find the draw isn't too hard ,all you need is a DMM - digital multi-meter . Test for voltage drop over the fuse's . I know GM vehicles had instrument cluster problems that would cause this problem , but test first . Watch these videos .
The BEST Way TO Perform Parasitic Draw Test
Chevrolet Truck Battery Dies Overnight Part

2003 Chevrolet... | 252 views | 0 helpful votes


you have to buy the special tool to release the line any autopart store will have it for under 20.oo bucks

2003 Chevrolet... | 227 views | 0 helpful votes


When you unplugged the alt,did you disconnect the larger alt output power wire?That.s usually where a power draw will be in an alt as this wire is connected to the diodes.

2003 Chevrolet... | 87 views | 0 helpful votes


Doesn't use a fuse , ues a circuit breaker . These very rarely go bad .The right rear door works ? Uses same circuit breaker as front passenger door. The power windows an locks on your vehicle are controlled by electronic control modules . FPDM - front passenger door module , I would look for a broken orange wire inside the flex boot from the body to the front right passenger door . This is power supply to the passenger door module . Do you know what wiring diagrams are ? Free here http://www.bbbind.com/free-tsb

2003 Chevrolet... | 182 views | 0 helpful votes


Not to question your ability, if you listen from the drivers seat while driving, just do yourself a favor, check the rear brakes, funny how sound travels and tricks the mind

2003 Chevrolet... | 103 views | 0 helpful votes


GM had insturment cluster problems 2003 to 2006 . Inside is a part called a stepper motor , this stepper motor controls the gauge position .
How to repair GM Instrument Cluster Speedometer Gauge Stepper
Beside's the stepper motor issue there can also be a problem with something called silver migration , this has to do with the solder used in the insturment cluster . This can cause a number of electrical problems most people would not even think possible .
Silver Migration
Watch this two videos .
Chevrolet Truck Battery Dies Overnight Part
Chevrolet Truck Battery Dies Overnight Part II


2003 Chevrolet... | 494 views | 0 helpful votes


Just a question. Does the truck do this after the truck is warmed up. If not this is a temp. issue and can be a few items. Generally this is an electric switch issue. Remove the fuse from the system when you shut it off for the night and see if it still jumps to 4x4 mode.

2003 Chevrolet... | 82 views | 0 helpful votes


oil pump is in the oil pan better not have anything to do with water pump

2003 Chevrolet... | 124 views | 0 helpful votes


ecm has been replaced????? was it programmed ?

2003 Chevrolet... | 93 views | 0 helpful votes


Being and electronic speedometer, it will surge a touch when engine first started or switch first turned on, that's normal, but the only reason it is not working while driving is most likely a faulty speed sensor. Code should tell you this with a reader.

2003 Chevrolet... | 198 views | 0 helpful votes


2 options
the brake pads are worn past safe and the small;; spring is running on the disc rotor , or there is a failing cv joint making the noise

2003 Chevrolet... | 393 views | 0 helpful votes


PRNDL Display
The instrument panel cluster (IPC) displays the selected gear position as determined by the powertrain control module (PCM). The IPC receives a class 2 message from the PCM indicating the gear position. The PRNDL display blanks if:
• The PCM detects a malfunction in the transmission range switch circuit.
• The IPC receives a class 2 message indicating the park position and the column park switch indicates a position other than park, open input.
• The IPC detects a loss of class 2 communications with the PCM.

Could be the transmission range sensor . Testing would need to be done , hooking up a scan tool ! Doing electrical testing etc...

2003 Chevrolet... | 135 views | 0 helpful votes


Take it to auto parts store an have diagnostic tool hooked up to read codes >

2003 Chevrolet... | 499 views | 0 helpful votes


take out the speaker in question and test it.
a 9v battery is good enough to 'burp' it.
if it makes a scratchy noise when you put power to it then you have a short in the voice coil.
Burping a speaker is just a short power up. Don't hold power to it.
Tap it on and off like a music note measure.

2003 Chevrolet... | 112 views | 0 helpful votes


there are no sensors on any car that would keep the starter from engaging even if the fuel tank was completely removed remove the starter and have your local oreillys or autozone bench test it if its good then you have an electrical issue could be related to your ignition switch, starter and or ignition relay or fuses check all of those

2003 Chevrolet... | 74 views | 0 helpful votes


https://s1.postimg.org/8oivhsraj3/underhood_fuse_box.jpg
Click on the link.
I looked at your owners manual.
F pmp in the circle should be fuel pump relay, under hood fuse block. I you don't have an owners manual, my.gm.com
Has your owners manual, you can look at it for free.

2003 Chevrolet... | 56 views | 0 helpful votes


Check the fuse. It's usually located in the passenger compartment fuse box.

2003 Chevrolet... | 39 views | 1 helpful votes

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