2003 Chevrolet Silverado Ss - Answered Questions & Fixed issues

There is no fuse specifically dedicated to the fuel pump on this year and model of Suburban. This Suburban is equipped with dual tanks and as such has two relay switches, primary and secondary, both of which are located at the main fuse box in the engine bay, that power up the respective fuel pumps.

The closest fuse (15A) controlling either of these relays also powers up the main control module (located beside and below the main fuse box). So, if one needs to disconnect the fuel pumps from functioning, then the only effective method is to disconnect the fuel pump relays.

drive shafts or u joints

Hi, this is a pretty common problem on these Silverado instrument clusters. We can repair it for you or provide you with the parts to do it yourself. Click here to learn more about these silverado instrument cluster problems: Dr Speedometer Instrument Cluster Repair Speedometer Repair Guage...

replace instrument panel cluster

You have an engine management problem could be blocked particulate filter or engine sensor you will need a diagnostic plug into the obd connector with a computor to read the faults stored in the engine control unit to be able to diagnose further

This could be but not limited to a faulty O2 sensor. Other chances could be a dirty air filter, fuel filter, MAF sensor or even a small vacuum leak from the engine head gasket. If there is a CEL triggered, it would be better to connect the diagnosis tool and check for the codes as this might help you in locating the exact cause of the problem.

check power steering pump .check fluid level.

if theres a knock when you start it and it goes a way after it warms up you may be a little low on oil or cuz its a chevy it just needs to warm up before driving naturally a bigger engines gonna take longer for oil to move through all the parts especially in colder weather. maybe even check and see if it needs a valve adjustment.

APP 1 and APP 2,Throttle position correllation. Whenever you get a reduced power,It will always be related to the throttle actuator, or APP (accelerated pedal position).There is a disagreement between both position sensor, or the TPS itself.

go pick up a cheap obd2 scanner from the parts store and clear it. the only problem is if you have not fixed the problem it will just come back.

With a 1/2in. drive spark plug socket, 4in extension and a breaker bar.

There is an electrical problem somewhere.

Take your truck to a GM dealer and have the Body Control Module checked. The bcm controls most electrical and display functions inside of your vehicle.

GM had gauge cluster problems from 2000-2005. Bad stepper motors. On those units you have to replace the cluster or rebuild it with new stepper motors.

YES AND THERE IS A RELAY YOUR MANUAL SHOULD SHOW YOU BOTH

Please see my tip at http://www.fixya.com/cars/r5932051-check_engine_light_check. These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Being a ss, sounds like your AWD transfer case if it was never serviced may be worn out and will need to be replaced. The other area that would cause the same issues you have described would be a bad CV join or U joint.

Start with the simple and inspect your CV and U joints. If all seem to be in 100% working order, then move on to inspecting your transfer case and front differential.

Thank you for using fixya and be safe.

This vehicle does not come with a factory installed air cabin filter.Hope this helps.Good luck.

Brake switch is on the brake peddle arm, look up under the dash, held on with a clip, remove clip and slide switch off.

Just went through this with my 2002 Buick Lesabre. It ended up being the Ignition Control Module. On the 3.8 l engine it is under the 3 coil pack. Probably a similar location on your silverado. Mine cost $140 but was easy to replace.