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02-10-2011, 11:44 AM
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#1 |
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Registered User
 
Join Date: Jun 2009
Location: Lawson Mo
Posts: 147
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Tow/Haul mode no go
As you can see I'm having a problem with the tow/haul mode on my 2000 Sierra. I can press the button on the shifter lever all day long and nothing happens. Is there a fuse that could be blown? Thanks ahead of time.
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2006 Silverado 2500 HD |
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02-10-2011, 12:27 PM
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#2 |
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On a budget like Fred Sanford
Join Date: Oct 2005
Location: Topeka, KS
Posts: 2,031
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Re: Tow/Haul mode no go
Going off my (bad) memory, pressing that switch simply grounds a pin on the PCM to tell it to use the tow/haul shifting tables. I would bet the switch is shot......
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'85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD |
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02-10-2011, 01:28 PM
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#3 |
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Registered User
Join Date: Jun 2006
Location: Jackson, Mo.
Posts: 607
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Re: Tow/Haul mode no go
Another thing to check is a pair of wires that run from the switch down the column. From what I've seen about this subject, they have a bad habit of breaking inside the column. Do a search on this subject and you'll find some info on which wires and where and on repairing them.
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Chris 1966 Chevy C10 LWB, 434 sbc, TH350, 12-bolt, factory suspension, pump gas 7.02 @ 95.8, 1.45 60' 1965 Chevy C10 LWB, 355 sbc, TH350, daily driver |
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02-10-2011, 07:25 PM
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#4 | |
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Hittin E-Z Street on Mud Tires
Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
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Re: Tow/Haul mode no go
Quote:
 Happened on my truck. Not too hard to fix.
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Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride  American Born, Country by the Grace of God  1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! |
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02-11-2011, 11:47 AM
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#5 |
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Registered User
Join Date: Jun 2009
Location: Lawson Mo
Posts: 147
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Re: Tow/Haul mode no go
I'll definitely check this out. Thanks for the help! I'll let you know what I find out.
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2006 Silverado 2500 HD |
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02-11-2011, 12:10 PM
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#6 |
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LSX addict
Join Date: Jun 2009
Location: Tyler, Texas
Posts: 262
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Re: Tow/Haul mode no go
my wire was clean cut in half too! no signs of any use of a knife or anything. its an orange wire tho, btw.
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-1982 C10 SWB GMC Sierra [undergoing 6.0/4L80E swap with mild restoration] |
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02-21-2011, 01:43 AM
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#7 |
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Registered User
Join Date: Jun 2009
Location: Lawson Mo
Posts: 147
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Re: Tow/Haul mode no go
SO finally had a chance to take things apart and turns out you guys were spot on. Wires were cut clean in two. Had powerdriver1958 help me solder the wires back together and everything is good. Thanks for the help everyone.
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2006 Silverado 2500 HD |
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03-09-2011, 02:19 AM
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#8 |
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Registered User
Join Date: Mar 2011
Location: Eugene Oregon
Posts: 1
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Re: Tow/Haul mode no go
It's the Orange wire. Mine happened @ 100k miles. Easy fix with solder gun and shrink tubing. No problem in 15k miles. The fix is much cheaper then replacement as you have to buy the whole shift handle from Chevy
Last edited by 72rebuilder; 03-09-2011 at 02:20 AM. |
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