For 1990-2009 cars

# 1981 LIMOUSINES DFI INSTALLATION OF JUMPER HARNESS

1981 LIMOUSINES ARE EQUIPPED WITH THE DIGITAL FUEL INJECTED (DFI) V8-6-4 ENGINE. THESE VEHICLES ARE NOT EQUIPPED WITH A MPG DISPLAY PANEL; THEREFORE, YOU CANNOT PASS SOME OF THE 70 SERIES SWITCH TESTS, ENTER THE OUTPUT CYCLING AND CYLINDER SELECT TESTS, OR OBSERVE ENGINE PARAMETERS IN THE NORMAL FASHION USING THE INSTANT/AVERAGE, MPG RESET, AND ACTIVE CYLINDER BUTTONS ON THE MPG DISPLAY PANEL. THESE DIAGNOSTIC FEATURES CAN BE ACCESSED BY USE OF A JUMPER HARNESS WHICH CAN BE OBTAINED FROM YOUR LOCAL ZONE OFFICE OR CONSTRUCTED AS SHOWN ON REVERSE SIDE.* THE CONNECTORS ARE AVAILABLE FROM GMWDD IN QUANTITIES OF TEN. ALTHOUGH IT IS NOT NECESSARY TO USE BROWN AND BROWN/WHITE WIRE, CONTRASTING COLORED WIRE SHOULD BE USED TO FACILITATE TESTING. WHEN INSTALLED, THIS HARNESS SHOULD BE LEFT IN THE VEHICLE FOR FUTURE USE. * LIMOUSINES BUILT AFTER APPROXIMATELY MAY 1, 1981 SHOULD HAVE THE JUMPER HARNESS INSTALLED. ** SEE BULLETIN FOR PROCEDURES & ILLUSTRATIONS **

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