2005 Chevrolet Tahoe Ignition coil

THIS SHOULD BE YOUR DIAGRAM

SORTA WHAT PART OF THE COUNTRY ARE YOU IN. GIMME YOUR ZIP OR ONE CLOSE BY

HERE IN THE EASTERN STATES, I'M ABLE TO SAVE A BIG CHUNK WHEN I BUY AUTO PARTS. LIKE $40 OFF OF A $110.01 PURCHASE!

THIS "EZ, OVERLOOKED METHOD" MIGHT HELP YOU A BUNCH WITH YOUR TUNE-UP AND FUTURE PURCHASES

PERSONALLY, I DON'T THINK YOU SHOULD CHANGE 'EM ALL. HOWEVER, I'M ONE TO PREPARE FOR FUTURE PROBLEMS, ESPECIALLY IF THE TRUCK IS A "KEEPER".I MIGHT PURCHASE A SPARE, THIS WOULD LET ME "FIX" IN AN INSTANT. IT MIGHT ALSO BE USED TO DIAGNOSE, BY SWAPPING IT WITH SUSPECT BAD COIL PACKS, SHOULD IT SKIP IN THE FUTURE AND NOT THROW A CODE (LIKE MY WIFE'S FORD ESCAPE DID)

I ALSO KEEP A COIL/ IGNITION MODULE/ FUEL PUMP/ AND BASIC "GET BY" TOOLS IN MY 1977 CJ 5 (TOOLS AND SPARE STUFF IN MY 1946 WILLYS TOO). THESE ARE ITEMS THAT ARE EZ TO REPLACE, AND HAVE IN THE PAST, LEFT ME A-WALKIN'. IF ONLY I HAD BEEN PREPARED!

. NO MORE. SINCE I HAVE HAD THEM ON BOARD, I HAVE NOT NEEDED THEM. ON TWO DIFFERENT OCCASIONS, TWO CJ 7 OWNERS THAT I DIAGNOSED ONE NEEDING A FUEL PUMP AND THE OTHER, AN IGNITION COIL. WHILE THEY WERE STRANDED ON THE HIGHWAY.I REALLY LIKED THE "STUNNED LOOKS", WHEN I PRODUCED THE NEEDED PARTS OUT OF MY CONSOLE. NOT ONLY DID I GET THE $$$ BACK TO REPLACE MY PARTS, BUT I GOT A NICE CHUNK FOR INSTALLING THEM TOO!

YOUR TURN THE MEDIC

Number 6 is the third one back on the passenger side. Be aware that diagnostic fault codes never say to replace parts or that they're defective. They only indicate the circuit or system that needs further diagnosis. In this case it would be standard procedure to swap the number 6 ignition coil with one of the other ones, erase the fault code, then see if a code sets for the same cylinder or the one you moved the coil to. An ignition coil can become partially shorted but it is just as likely there is corrosion on the terminals in the connector. If you have a definite constant misfire it is just as likely you have a broken wire as a defective coil.

Beginning with '96 models the Engine Computers can detect which cylinder is misfiring but you didn't get a misfire code. That suggests the ignition coil is still working in spite of an electrical problem.