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Chevrolet Repair/B/U Lights on 04 Duramax

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Question
The backup lights on my 04 CHev 2500HD 4x4 Duramax no longer work.  Have checked for, and found switching working at the park/neutral position switch on the left side of the tranny, but am unsure where to go from there.  the power is not getting to the lights.

Answer
HI JACOB,,,OK SO IF YOU KNOW THE SWITCH IS SENDING POWER TO THE REAR,NEXT STEP IS TO CK THE PLUG HARNESS IN THE REAR UNDER THE LEFT SIDE OF THE BED,MORE THEN LIKELY IF YOU UNPLUG THIS  HARNESS YOU WILL FIND GREEN INSIDE,, AS IN CORRODED..THIS IS A FAIRLY COMMON PROBLEM. ALSO CK FOR POWER THAT FEEDS THE REVERSE LIGHTS.[REMOVE A TAIL LIGHT AND CK THE COLOR WIRE THAT FEEDS THE REVERSE LIGHT SOCKET.THIS WILL BE THE SAME COLOR WIRE AT THE PLUG UNDER THE BED.].CLEAN IT UP IF YOU CAN OR CUT OUT THE BAD SECTION AND BUTT CONNECT IT WITH SHRINK TUBING TO PROTECT IT..IF THERE IS POWER TO THIS POINT THEN THE NEXT AREA IS THE PRINTED CIRCUIT IN THE TAIL LENS ASSEMBLY ITSELF. UNPLUG THE PRINTED CIRCUIT PLUG AND SEE IF THERE IS POWER TO THE REVERSE LIGHT SIDE OF THE CIRCUIT, THIS IS WHERE ALL THE LIGHTS GET PLUGGED INTO. IF SO THE CIRCUIT IS FAULTY. BUT BEING BOTH THE REVERESE LIGHTS ARE OUT I THINK YOU WILL FIND A PROBLEM IN THE WIRING HARNESS GOING TO THIS AREA.IAM SURE YOU HAVE CHECKED THE BULBS ????  YOU NEVER KNOW.JUST ASKING !!!! LET ME KNOW HOW THIS WORKS OUT FOR YOU AND GOOD LUCK,,,,TOM...

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TOM SHEETS

Expertise

PLEASE READ ALL OF THIS BEFORE ASKING ANY QUESTIONS. IF THIS CHEVY SECTION IS MAXED OUT.YOU CAN REACH ME IN THE OLDS/BUICK SECTION. Will answer questions from 6:00am to 10:00pm all days [EST][[[ NO DIESEL OR PAINT QUESTIONS]]] will answer all 1965 to present QUESTIONS ON ALL GM'S on mechanics of these cars. Keep in mind i am not there in person i am going on what you are telling me !! PLEASE IF ASKING A QUESTION GIVE ME AS MUCH INFO AS POSSIBLE. THE MORE THE BETTER. SUCH AS YEAR,MAKE,MODEL,ENGINE SIZE. THIS WILL HELP ME HELP YOU. I will not be able to answer all questions because of some situations that i would really need to be there and see things for myself,such as electrical issues. In many cases i would need wiring diagrams. I can also give you an estimate on what the cost would be at our repair shop as an idea to help you. Keep in mind that my answer is ONLY MY ADVICE,ck with your mechanic as well.. >> THANK YOU, TOM..

Experience

I have been a ASE certified master mechanic for over 30 years and certified IN ALL 8 CATEGORIES,[engine repair,engine performance,auto trans,manual trans,clutches,steering and suspension,brakes,electrical systems,heating and air/cond. I am also a state CERTIFIED inspector for over 30 years. I do computer work [pcm]fault codes,pcm flashing,state inspection monitor readiness,repairs on exhaust,fuel service,[injection and carburetor,] charging system problems, running issues,alignments,frame problems,tire balance,struts and of course standard and anti-lock brakes.

Organizations
nys state auto repair industry and ase group.

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N/A

Education/Credentials
high school,4 years of tech school,and many many hours of auto training with many gm classes and aftermarket training classes..

Awards and Honors
ASE MASTER TECH CERTIFIED IN ALL 8 CATEGORIES.NYS INSP LICENSE AND A/C CERTIFIED

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MANY CUSTOMERS IN OUR BUSY SHOP.

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