trans will not shift on its own

45

Asked by Mar 10, 2013 at 09:05 AM about the 1994 GMC Sierra 1500 C1500 SLE Extended Cab SB

Question type: Maintenance & Repair

i just put a rebuilt trans in my truck and its doing the same thing my old trans did,it won't
shift at all if i put it in overdrive but if i start out in 1st gear then i can shift in to 2nd but
thats it

2 Answers

17,945

the Vehicle speed sensor may be defective or the throttle position sensor. They may be bad or the wiring harness may be damaged and the signal isnt getting to the computer or trans. 94 was the 1st year for the electronic 4l60e, it needs the computer and specific sensors that take place of normally hydraulic controls. Does your speedo work?

2 out of 2 people think this is helpful.
45

yes the speedo works and the engine light goes on and off from time to time and now when i use the scanner on it, it says operator error. but the engine seems to run fine

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • Why can't I get transmission to shift up out of low on it's own, or manually?? 1 answer

    1991 GMC 2wd 1500 5.7 4l60e transmission: trans. won't shift up out of 1st to 2nd or any other gear on it's own or even when i manually try to shift to 2nd or any other gear. It freewheels exactly l...

    1991 GMC Sierra 1500 C1500 SLE Standard Cab LB

    -

    Maintenance & Repair

  • transmission shifts hard 16 answers

    5.3 L engine (from 2002 Silverado) with a 4l80e transmission shifting hard from 1st to 2nd gear. All other gears shift normal

    2001 GMC Sierra 1500 SLT 4WD Extended Cab LB

    -

    Maintenance & Repair

  • Speedometer doesn't work and transmission doesn't shift gears. 53 answers

    The speedometer stays at 0 all the time. When the transmission is in drive it won't come out of 1st gear. Reverse works fine, and if I manually put the transmission in 1st or 2nd it works fine. 199...

    1999 GMC Sierra 1500 SLT 4WD Extended Cab LB

    -

    Maintenance & Repair

  • 1994 1500 sierra vibration when shifting at high speeds 8 answers

    when driving at constant speed over 40 the truck shakes when downshifting to maintain speed. carrier bearing was loose so i shimmed it to see if that was a fix. not as bad but still doing it. is this ...

    1994 GMC Sierra 1500 C1500 SLE Extended Cab LB

    -

    Maintenance & Repair

  • transmission swap ? 3 answers

    i have a 2000 gmc z71 sierra 1500 with 236000 miles and a 4L60E trans the truck shifts trough 1st 2nd and 3rd just fine but wont go any higher. is this a big expensive fix or something simple ,and i h...

    2000 GMC Sierra 1500 SLT Extended Cab Stepside SB

    -

    Car Customization

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 4,920
#2 John Saffrahn
John Saffrahn
Reputation 3,490
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 3,070
View All

Related Models For Sale

Used Ford F-150
2,246 Great Deals out of 209,111 listings starting at $1,499
Used Dodge Ram 1500
444 Great Deals out of 11,391 listings starting at $700
Used Toyota Tacoma
497 Great Deals out of 39,697 listings starting at $1,995
Used GMC Yukon
346 Great Deals out of 17,218 listings starting at $2,500
Used Chevrolet Tahoe
569 Great Deals out of 27,522 listings starting at $1,500
Used Chevrolet Camaro
149 Great Deals out of 32,800 listings starting at $1,995
Used GMC Sierra 2500
162 listings starting at $4,995

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
40 Great Deals out of 42,018 listings starting at $20,121
2016 GMC Sierra 1500 For Sale
96 Great Deals out of 3,781 listings starting at $18,200
2015 GMC Sierra 1500 For Sale
100 Great Deals out of 3,925 listings starting at $15,400
2014 GMC Sierra 1500 For Sale
111 Great Deals out of 4,277 listings starting at $14,495
2013 GMC Sierra 1500 For Sale
63 Great Deals out of 2,120 listings starting at $9,260