Question about 1991 GMC C1500

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What model year engines interchange with 1991 GMC 5.7l

I'm replacing the motor in a 1991 GMC 1500. If I use the existing TBI intake, what year model 5.7 engines will "bolt in" with minimal wiring issues?

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6ya6ya
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Posted on Jan 02, 2017

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zaffoid
  • 1 Answer

SOURCE: 1991 GMC TBI 350 sierra stalls bad

Could be the TPI Sensor or it might be a touch out of timing.

Posted on Apr 23, 2009

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  • 34 Answers

SOURCE: 7 wire harness going to blower motor resistor

There is an updated resistor/connector package. Very expensive from GM, try your local NAPA or other parts supplier for a replacement

Posted on Jul 09, 2009

  • 291 Answers

SOURCE: 1991 GMC Sierra loses fuel pressure after it reaches the TBI

THE INJECTORS ARE PULSED TO GROUND DIRECTLY BY THE ECM...... MAIN COMPUTER... IT COULD BE FLAKY BUT I HAVE FOUND MANY TIMES THAT THE HALL EFFECT SENSOR LOCATED IN THE TOP OF THE DISTRIBITOR GETS INTERMITTANT.... THIS CAUSES LOSS OF SIGNAL TO ECM INTURN LOSS OF SIGNAL OUT OF ECM TO INJECTORS... LET ME KNOW

Posted on Sep 01, 2009

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SOURCE: 2004 gmc sierra 1500 blower motor location

The blower motor is on the passengers side under the dash.You might have to remove the a lower panel.This is the insulator panel.If the blower works at all just turn it on and follow the noise.Hope this helps.Good luck.

Posted on Apr 08, 2010

mikes112
  • 56 Answers

SOURCE: 1991 gmc 1500 blower motor doesnt work

I had to change the blower motor, turns out the spring tension on the brushes on the motor were too tight and ate into the brass commutator of my old motor.

Posted on Sep 17, 2010

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1 Answer

Ok I am wondering if my motor in my 91 gmc 5.7 l b8 is a vortec or a 350 it has throttle body carb and not sure thought if I could interchange it with an older 350 ..


Here, is what I think you are asking. The TBI intake from a 91 will fit the same size engine from 88 to 95. The Vortec didn't come out till 96 I believe. So if your 91 is the original engine then it is not a Vortec motor. If you want to swap your 5.7 with another 5.7 (5.7 = 350) Then the 88-95 should work, Just double check your sensors and locations as the plugs may be different and or in different locations. I know my 88 GMC and my 94 chevy (both K1500's) were a little different. Hope this helps.

Jan 17, 2015 | 1991 GMC Sierra

1 Answer

Have wrecked 1990 1500 v8 what year of truck interchange


if is the TBI 350 (5.7L), anything from about 1989 to 1995 should be alright, give or take a few sensors. i have owned an 89 suburban, a 90 suburban, and a 95 suburban, and the all have the same motor.

Nov 06, 2014 | Cars & Trucks

1 Answer

Head replacement, interchange w/ what yrs?


Looks like models from 1985 to 1994 including carb and TBI.

A salvage yard can tell you for sure.

Jul 11, 2013 | 1990 Subaru Loyale

1 Answer

What year motors, can I use to replace my blown 1996 305 vortec? I own a 1996 GMC 1500, sl, ext. cab. Does it have to be a vortec for my current computer to work properly? Will engine mounts, bell housing,...


You can use any 305 motor. Like you said you will have to exchange parts from your old motor to the new one. Just make sure you don't go to far back, because the old 305's don't have the injector ports. Then you would have to replace the heads also.

Jan 23, 2011 | GMC Sierra 1500 Cars & Trucks

1 Answer

What year motors, can I use to replace my blown 1996 305 vortec t.b.i.? I own a 1996 GMC 1500, sl, ext. cab. Does it have to be a vortec for my current computer to work properly? Will engine mounts, bell...


Yes any TBI motor will work, You do have to switch your sensors, possibly motor mounts and balancer from the old motor. all other items should transfer.

Jan 22, 2011 | 2006 GMC Sierra

1 Answer

What year motors, can I use to replace my blown 1996 305 vortec t.b.i.? I own a 1996 GMC 1500, sl, ext. cab. Does it have to be a vortec for my current computer to work properly? Will engine mounts, bell...


Untill recently GM didn't change much of anything as far as bolt paterns You could bolt up a 350 from 20 years ago to your transmission and motor mounts. But that is not really what your wanting to do. The question is do you have a "vortec" or is it TBI. The vortec motor says vortec all over it (they were pretty proud of it I guess) The earlier TBI motor, at first glace look just like the old carburetor versions until you take of the air cleaner and find a throttle body instead of a carburetor. The two are not interchangeable as to the electronics, they are way diffract.

Jan 22, 2011 | 1996 GMC Sierra

2 Answers

How many qts oil does it take?


For 1991 GMC Truck S15 4WD 4.3L TBI 6cyl...

Engine Oil Type/Weight/Capacity

3539
Application:
Oil for use in temperatures above 39 degrees
Note :
Pennzoil Premium Motor Oil HD30

Application:
Oil for use in temperatures above 39 degrees
Note :
4 Quarts without filter change

VALHD30
Application:
Oil for use in temperatures above 39 degrees
Note :
Valvoline Premium Conventional 30 Motor Oil

Hope helps (remember rated this).

Jun 10, 2010 | 1991 GMC Sonoma

1 Answer

Are the parts from a 1990 toyota 4 runner interchangeable with a 1991 4 runner? I'm not looking to swap the engine, just the exhaust system, power window motors and such.


most parts from 90-95 will interchange. also, alot of parts from the pickups during those years are interchangeable with the 4runner.

Feb 05, 2010 | 1991 Toyota 4Runner

1 Answer

Oil presser is going up and down in my gmc 1500 4x4 it has a 350 tbi


that is a good thing. The pressure goes up as the engine speeds up

Jan 15, 2009 | 1991 GMC K2500

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