JOBLOW06

I Have An 03 Gmc Truck With The 5.3 And I Just Installed The A 5" Tach On It. I Attached The Green "coil Wire" To The White Wire On The Back Of The Guage Cluster And I Am Only Getting Half Of The True Rpm. I Need To Know Has Any One Had This Problem And How Do I Fix It?

bluecajun5.3

iTrader: (31)

read the instructions. with these trucks you have to read the 4 cylinder instructions. can't remember how many wires you have to cut though.

Nick™

iTrader: (2)

yeah, go figure.... the LS1 style motors require you to run the tach as a 4 cyl. setup, something to do with the reading vs. the individual coil packs

JOBLOW06

So Run It As A Four Cyl. And Cut Both Wires? Whats The Reasoning For That? Ill Go Cut Em Now But For Future Reference - Why?

JOBLOW06

Thanks For The Help Guys It Works Like A Charm Now. Finally A Site That Offers True Assistance. Thanks Again

bluecajun5.3

iTrader: (31)

no prob buddy. glad it worked out for you.

smooth_addictions

which wires did you cut?

JOBLOW06

I Used The Autometer "autogage" Series (the Cheapest) And Cut Both The Orange And Brown Wires. This Set It Straight And Thanks Again For The Help.

slowprocess

iTrader: (9)

Got any pics of where you mounted teh tach? Just curious, because I got rid of my small digital tach and am now thinking of going with an autometer c2 to match the rest of them. I haven't found a place i like to mount it yet, though.

JOBLOW06

Sorry, No Camera Or Scanner Here. I Mounted It On Tha A-pillar With These Little Foam Blocks On The Backside. I Got The Blocks From Hobby Lobby. My Concern Was That The Plastic Piece Wouldnt Hold Up. The Blocks Are About 1/4-3/8" Thick And Have An Adhesive On The Back. They Hold Well And There Is No Flimsyness Whatsoever On The Pillar Cover. Worked Out Really Well. I Ahve Also Seen Them Mounted On The Trans Hump Pointing Up At The Driver, Just For Your Info.