20 Most Recent 2003 GMC Sierra 1500 Questions & Answers

code p 0654 refers to engine rpm output--circuit malfunction ===causes wiring ---ECM
code p 0650 refers to malfunction indicator lamp(MIL)--circuit malfunction====causes wiring --MIL---ECm
also refers to crankshaft position/cam shaft position sensor bank 1 sensor A --correlation===causes wiring---CKP sensor ---CMP sensor--mechanical fault

2003 GMC Sierra... | Answered on Jan 27, 2018

try ignition with key in and turn to number 2 and press fob button if the doors lock its worked, it f not you need to remove the battery negative and turn ignition on and lights and leave on for a few moments then turn all off again, then fit battery and do the first part again. hope this helps you.

2003 GMC Sierra... | Answered on Dec 10, 2017

Instrument cluster problem ! Have it rebuilt or buy a used one . GM had instrument cluster problems 2003 to 2006

2003 GMC Sierra... | Answered on Dec 01, 2017


Click on the link.
As you can see, the hi--lo beam on the right side uses one ground. The hi and low beam on the left side use a different ground. If I suspect a ground problem, I use a redundant ground to see if it helps?

2003 GMC Sierra... | Answered on Oct 31, 2017

moisture problems, on a dry day start the truck and witha a water bottle or a hose start spraying different components , works better in a dark area, you may see a spark appear around the distributor, otherwise when you reach the problem area the truck will start to miss

2003 GMC Sierra... | Answered on Oct 25, 2017

I would say the torque converter is shot.

2003 GMC Sierra... | Answered on Oct 15, 2017

Transfer case internal problem . Not a solenoid problem .

2003 GMC Sierra... | Answered on Oct 08, 2017

I do not see a separate fuse for the heaters, so you have power thru the 25 amp breaker. You will, have to pull the panel up or access the mirror connector to trace power to the elements. Not sure which is easier. I have pasted all of the relevant diagrams.
Likely failure modes are open heating element and failed heater switch.



2003 GMC Sierra... | Answered on Jul 23, 2017

take your car to the relevent work shop

2003 GMC Sierra... | Answered on Apr 19, 2017

no they dont cover the paint or clear coat regardless if it was never in an accident -or garage kept its whole life and theirs only 4 recalls on the truck but not for paint

2003 GMC Sierra... | Answered on Aug 24, 2016

Open up the other door speaker to check. I would guess it would be the darker green. It wont harm anything to try either one. It is low voltage. If one doesn't work, switch the wires.

2003 GMC Sierra... | Answered on Feb 20, 2016

Dies this wire come out of the dim switch??? If so, with vol meter check for voltage changes when you tuggle dim switch. If you notice changes trace wire with same color and reattach. If wire came off from the back of cluster connector you would need to get a cluster plug pin out to place wire in its proper place..

2003 GMC Sierra... | Answered on Feb 07, 2016

I tie them in with any dash light wire. Tape it up afterwards and it will be fine.

2003 GMC Sierra... | Answered on Feb 07, 2016

Is the check engine light on ? . What transmission 4L80E / 4L85-E or 4L60-E / 4L65-E
1st Gear Range Only - No Upshift Checks

Control Valve Body (60)
• The 1-2 Shift valve is sticking
• The spacer plate or gaskets are mispositioned or damaged

Case (103)
The case to valve body face is damaged or is not flat

Shift Solenoid Valves (366/368)
• Stuck or damaged
• Faulty electrical connection

2-4 Servo Assembly (13-28)
• The apply passage case is restricted or blocked
• Nicks or burrs on the servo pin or on the pin bore in the case
• Fourth servo piston is installed backwards

2-4 Band Assembly (602)
• The 2-4 band is worn or damaged
• The band anchor pin is not engaged

2003 GMC Sierra... | Answered on Nov 19, 2015

Linkage, synchronisers,..You need tranny repair!!!!!!

2003 GMC Sierra... | Answered on Nov 19, 2015

Sounds like you are losing wheel speed signal when under hard turns. This is commonly caused by the harness at or near the wheel speed sensor has a bad connection of there may be a break in the wiring that intermittently loses signal to the ABS module and causes the anti-lock function to happen, (loss of wheel speed is like wheel skid as far as the ABS module is concerned) It is usually necessary to have a scan tool to monitor the data and read codes on the ABS system. You may have to take vehicle to shop that is capable of diagnosing the problem.

2003 GMC Sierra... | Answered on Oct 13, 2015

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