Owners manual

GP500S

6.0L STAINLESS HEADER

NO AIR INJECTION, NO EGR

CADILLAC ESCALADE 6.0L

SILVERADO/SIERRA PICKUP 6.0L

SUBURBAN/YUKON/DENALI/TAHOE 6.0L

AMC HUMMER 6.0L

GIBSON HEADERS ARE 50 STATE SMOG LEGAL

Thank you very much for purchasing our Gibson header

For your vehicle.

If you need further assistance, please do not hesitate to call our Technical

Department at (800) 528-3044

Monday through Friday

8:00 a.m. to 5:00 p.m. PST.

1270 WEBB CIRCLE CORONA, CA 92879

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GP500S 6.0L STAINLESS HEADER NO AIR INJECTION, NO EGR CADILLAC ESCALADE 6.0L SILVERADO/SIERRA PICKUP 6.0L SUBURBAN/YUKON/DENALI/TAHOE 6.0L AMC HUMMER 6.0L GIBSON HEADERS ARE 50 STATE SMOG LEGAL Thank you very much for purchasing our Gibson header For your vehicle. If you need further assistance, please do not hesitate to call our Technical Department at (800) 528-3044 Monday through Friday 8:00 a.m. to 5:00 p.m. PST.
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INSTALLATION INSTRUCTIONS FOR GIBSON SHORTY HEADERS GP500S INSTALLATION OF THESE HEADERS REQUIRES AN ADEQUATE WORKSPACE, GENERAL MECHANIC’S TOOLS, GENERAL MECHANIC’S KNOWLEDGE, AND A REASONABLE DEGREE OF EXPERIENCE.MOST AUTOENTHUSIASTS WITH THESE RESOURCES WILL HAVE LITTLE DIFFICULTY INSTALLING THESE HEADERS.HOWEVER, YOU SHOULD CAREFULLY READ THE INSTRUCTIONS BEFORE ATTEMPTING TO INSTALL THESE HEADERS.IF IN DOUBT, CONSULT A PROFESSIONAL MECHANIC.
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7) RE-INSTALL THE SPARK PLUG WIRES & RE-CONNECT THE STEERING SHAFT, REMEMBER TO LINE UP THE ALIGNMENT MARK. 8) ON THE PASSENGER SIDE REMOVE SPARK PLUG WIRES AND SPARK PLUGS AND SET ASIDE. REMOVE THE BOLT ATTACHING THE DIPSTICK TUBE BRACKET TO THE HEAD.THEN REMOVE THE DIPSTICK BY GENTLY PULLING UPWARD WHILE TWISTING BACK & FORTH. 9) REMOVE THE SIX BOLTS ATTACHING THE MANIFOLD TO THE HEAD.REMOVE THE MANIFOLD FROM THE TOP.CLEAN THE SURFACE OF THE HEAD .REMOVE ANY CARBON DEPOSITS THAT MAY BE ON THE HEAD.
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