20 Most Recent 2003 Chevrolet Tahoe Questions & Answers

The fuses are usually under the dash on the drivers left side.
Hope this helps.

2003 Chevrolet... | Answered on Jun 26, 2020

There is no "wire" to use, the factory radio is connected to the canbus (part of the vehicle communications wiring that goes to your computer in the car). You need a converter box that converts it to a signal that your radio can "understand."

2003 Chevrolet... | Answered on Sep 25, 2019

Did you check your spark and your fuel pressure?

2003 Chevrolet... | Answered on Sep 11, 2019

Check the dealer and see if your radio automatically adjust to your speed. Some radios were built to raise the volume when driving at higher speeds and when you get in slow traffic or when you stop it would automatically adjust down the volume. You can also go to a Radio Shack and get a spray cleaner for electrical parts and pull the volume knob off of your radio and spray the volume control and turn it rapidly to remove any hidden dirt on that volume control.

2003 Chevrolet... | Answered on Sep 10, 2019

Passlock is pretty easy to diagnose and fix. See this post on how it works


The fix usually involves replacing the lock cylinder case


2003 Chevrolet... | Answered on Jun 30, 2019

I would change the fuel pressure regulator first, if no change in pressure the fuel pump is on the way out.I have a 01 silverado 4.8 and my fuel pressure is between 55and60 psi.

2003 Chevrolet... | Answered on Dec 20, 2018

Check all of the feed wires that come off the positive side of the battery. A fuseable link may be bad.

2003 Chevrolet... | Answered on Oct 02, 2018

Simple check is to determine if the engine coolant is getting to the rear unit. Two heater hoses run from the firewall, passenger side, under the car to the rear. At the firewall there is a 4 hose connector, heater control valve, that controls the amount of coolant to the rear unit. Sometimes it will plug up, some times the heater hoses will plug up, some times the control valve will not get the command to open with a vacuum hose.

2003 Chevrolet... | Answered on Oct 02, 2018

At this website
found all complete guide, much better language, complete detail in 800+ pages, and they also have live assistance feature

2003 Chevrolet... | Answered on Mar 09, 2018

It really sounds like a tranny problem, best addressed by a Transmission shop. It might be an easy fix, or a really expensive one.

2003 Chevrolet... | Answered on Mar 04, 2018

You may need to clean inside the throttle body. YouTube has videos on how to do it. Also, your Idle Air Control motor might have carbon build-up in the passage for idle air. Take the motor off, and clean it gently and check the air passage for blockage.

2003 Chevrolet... | Answered on Jan 24, 2018

I suspect a faulty ground connection. Add a separate medium gauge wire from chassis to tailgate, routing it through the existing wiring harness location. Ensure bare metal connection at both new ground wire locations.

2003 Chevrolet... | Answered on Jan 17, 2018

usually a bad blend door actuator motor

2003 Chevrolet... | Answered on Jan 15, 2018

Disconnect the battery and be very careful. The SRS system retains a lot of energy, and you should give the system time to completely power down before working on it.

2003 Chevrolet... | Answered on Jan 09, 2018

OK... this is from a "SOLVED" 2002 FIXYA post for:

"Temp sensor and compass not displaying on my 2003 yukon xl"

Temp sensor and compass not displaying on my 2003 yukon xl

... this info MAY help you with your 2003 Tahoe ~ it has some good tips for you!?

Here is more:

"Chevy Mechanic: Dave Nova
The problem is going to be a break in the circuit between the *SIR fuse and the yellow wire at the mirror connector. This wire travels through the relay block. You can check connections at the relay block and trace the wiring. You can also just run a new wire, it may be faster."


"Check for voltage on the yellow wire at the mirror connector with the key on. If there is voltage on the yellow wire then the problem is inside the circuit board in the mirror and the mirror will need to be replaced."

Dave Nova included the Fuse Block shown below in his post, but I see no "SIR" Fuse? * I just discovered it is a "Supplemental Inflatable Restraint (SIR) Fuse = AIRBAGS. The two photos below are MUCH closer to what you should have!


Chevrolet Tahoe GMT400 mk1 1992 2000 fuse box diagram Auto Genius


block 1-ay53xupi2pin52cfytgihs5s-2-1.jpg

block 2-ay53xupi2pin52cfytgihs5s-2-3.jpg
$50 please
just kidding of course and by the way, MERRY CHRISTMAS 2017 as of 24 min ago!

2003 Chevrolet... | Answered on Dec 25, 2017

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