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Chevrolet Repair/4WD push buttons

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Question
2005 1500 Silverado Z71 5.3 Engine 4WD Clubcab 410 posi. rear
Sometimes when starting truck, lights on push button 4WD do not light. When this happens you can not shift transfer case. Next time you start truck, neutral or other light may come on. Then you can shift transfer. Sometimes after several miles traveled, turn ignition off, and restart, 4WD lights function and everything is normal
Any ideas or help would be appreciated
Thanks, Keith

Answer
HI KEITH, THERE IS A 2 X4 SWITCH ON THE LOWER SECTION OF THE TRANSFER CASE SOMETIMES THESE WIRES CORRODED TO THIS SWITCH AND CAUSE THIS TYPE PROBEM. CK THAT OUT FIRST BEFORE BY NEXT IDEA WHICH IS YOU ARE NOT GOING TO LIKE THIS BUT, THIS IS CONTROLLED BY A TRANSFER CASE 4WD MODULE..THEY DO FAIL..BUT BEFORE JUMPING TO THIS THE BEST WAY TO FIND OUT FOR SURE IS TAKE IT TO A SHOP THAT HAS GM SOFTWARE OR A GM TECH 2 SCAN TOOL..THIS TOOL CAN GET IN THE SYSTEM AND DEMEND IT TO TURN ON 4WD HIGH, LOW, NEUTRAL AND SO ON. SO IF THE MODULE WILL DO THIS THEN THE MODULE IS MORE THEN LIKELY OK.THIS TRUCK ALSO HAS A TRANSFER ENCODER MOTOR AND SELECTOR SWITCH. THIS IS NOT LIKE THE OLD DAYS WITH A MANUAL SHIFTER ON THE FLOOR FOR THE TRANSFERCASE. SO BEFORE YOU GO OFF SPENDING LOTS OF YOUR HARD EARNED MONEY ON GUESSES IT IS MUCH CHEAPER TO GET THIS SCANNED TO KNOW FOR SURE..WITHOUT A SCAN YOU WILL BE LOST. I HOPE THIS HELPS 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.

Publications
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

Past/Present Clients
MANY CUSTOMERS IN OUR BUSY SHOP.

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