4l60e limp mode

Asked by Aug 06, 2017 at 06:33 PM about the 1996 GMC Sierra 1500 C1500 SLE Extended Cab Stepside SB

Question type: Car Customization

I put older 383 with vortec heads and carb
on truck, now I have 2nd,3rd,and reverse, the
person helping me cut front o2 senors, what
do I need to be hooked up and do you have a
diagram you can post I can follow, thanks

1 Answer


The 4L60E transmission needs some inputs from the factory computer to operate. I leave the computer in the truck and just disconnect what is not needed for the fuel injection system. This way the trans gets power and ground, coolant temperature and vehicle speed. You will need to give the computer tach signal from your distributor. find the correct tach signal wire in the connector that went to the old F.I. distributor and connect it to the tach terminal on the distributor you are now using. The last part is a bit trickier. You need a throttle position sensor. Holley sells a kit for their carbs for about 130 bucks. But you can make an adapter for your carb if you are handy.

1 people found this helpful.

Your Answer:

GMC Sierra 1500 Experts

  • #1
  • #2
    John Saffrahn
  • #3
    Glenn Clingenpeel
View All

Related Models For Sale

Used Ford F-150
93 Great Deals out of 12,293 listings starting at $352
Used Dodge Ram 1500
15 Great Deals out of 509 listings starting at $2,600
Used Toyota Tacoma
26 Great Deals out of 1,556 listings starting at $6,858
Used Chevrolet Tahoe
7 Great Deals out of 919 listings starting at $4,999
Used GMC Yukon
15 Great Deals out of 1,107 listings starting at $905

Used Cars for Sale

2018 GMC Sierra 1500 For Sale
7 Great Deals out of 6,622 listings starting at $26,375
2017 GMC Sierra 1500 For Sale
4 Great Deals out of 386 listings starting at $25,940
2016 GMC Sierra 1500 For Sale
8 Great Deals out of 320 listings starting at $23,994
2015 GMC Sierra 1500 For Sale
16 Great Deals out of 372 listings starting at $17,998

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.