Tachometer, 2004 z71 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jchav62 · 02-04-2010, 01:33 PM

Hey guys. I'm wondering if I'm the only one having this problem. It's been pretty cold and snowy here lately, and on cold mornings the tach doesn't ready correctly. It reads about 500-800 too low. When the engine warms up, I can shut it off and re-start it and it read correct. I know it's not a critical issue, but it bugs the crap out of me... anyone else experience this? Anyone know the fix?

Thanks...jc62

Gray Ghost · 02-04-2010, 04:36 PM

That may be a stepper motor problem....fairly common in guages that read badly. My oil pressure sometimes reads 80....when I shut it off it goes to 40 and stays. Then it will be fine for a week before it does it again.

rare86 · 02-14-2010, 12:38 AM

04s and 05s are notorious for gauge issues. There was a recall on them,but if you have more than 70,000 miles, it doesnt apply. Mine hit 72,000 the day I got the letter from GM. Now Im stuck rebuilding in myself with a junk yard gauge cluster. Otherwise its a $400 fix

72BlckButy · 02-14-2010, 12:41 AM

My FIL had this same thing happen to him about 1 week ago. Waiting for the part to come in and GM is going to cover it.

I recommend contacting your local GM dealer and see what they can do for you.

02-04-2010, 01:33 PM	#1
jchav62 1962 C-10 Join Date: Apr 2005 Location: Las Vegas, New Mexico Posts: 4,978	Tachometer, 2004 z71 Hey guys. I'm wondering if I'm the only one having this problem. It's been pretty cold and snowy here lately, and on cold mornings the tach doesn't ready correctly. It reads about 500-800 too low. When the engine warms up, I can shut it off and re-start it and it read correct. I know it's not a critical issue, but it bugs the crap out of me... anyone else experience this? Anyone know the fix? Thanks...jc62 __________________ Joseph Chavez "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4

02-04-2010, 04:36 PM	#2
Gray Ghost Senior Member Join Date: Sep 2004 Location: Terrell, TX Posts: 1,967	Re: Tachometer, 2004 z71 That may be a stepper motor problem....fairly common in guages that read badly. My oil pressure sometimes reads 80....when I shut it off it goes to 40 and stays. Then it will be fine for a week before it does it again. __________________ Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps.

02-14-2010, 12:38 AM	#3
rare86 Extended cab fanatic Join Date: Oct 2009 Location: Gardendale, Tx Posts: 314	Re: Tachometer, 2004 z71 04s and 05s are notorious for gauge issues. There was a recall on them,but if you have more than 70,000 miles, it doesnt apply. Mine hit 72,000 the day I got the letter from GM. Now Im stuck rebuilding in myself with a junk yard gauge cluster. Otherwise its a $400 fix __________________ If it has a motor, it has my attention.

02-14-2010, 12:41 AM	#4
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: Tachometer, 2004 z71 My FIL had this same thing happen to him about 1 week ago. Waiting for the part to come in and GM is going to cover it. I recommend contacting your local GM dealer and see what they can do for you. __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package) Last edited by 72BlckButy; 02-14-2010 at 12:41 AM.

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