putting a 1998 z71 engine into a 1995 z71, will the 1998 engine wire harness plug up

Asked by Dec 28, 2014 at 06:01 PM about the 1995 Chevrolet C/K 1500 Cheyenne Standard Cab LB

Question type: General

I have a 1998 wrecked z71 and I am putting this in my sons 1995 z71. I know there is some differences in wiring. will the 1998 harness plug directly up or will I have to modify it

7 Answers


Visually inspect the electronics on the engines. Do they look the same?

No this is why I am changing engine harness and all. I was just wondering if the harness will plug directly into the existing wiring on the fire wall or will I have to replace all the wiring? Thanks for the response.


Just swap the blocks if possible. The heads and up are different. The 98 heads will bolt on fine but the 95 intake won't bolt onto them. Your harness isn't at all compatable. Also the 98 engine requires 55psi fuel pressure and the 95 pump only puts out 13ish. If you ask me the swap isn't worth it. To make it work u need a new pump, the ecu and harness from the 98. The 98 transmission as well (electronics are different). And it's gonna be hit or miss with the instrument panel functioning.

1 out of 1 people think this is helpful.

I have the complete 98 truck here that runs perfect less than 100k on it but is totaled. So if I change the ecu and fuel pump would it work? I was going to put the complete drivetrain under the 95 from engine to rear end with ecu and all, but wasnt sure about how the wiring for the drive train would be with the all the inside wiring and components. the dash is the same the only difference is the 98 has pass. side air bag and the 95 only drivers side

Would the harness where it pugs in at the firewall plug into the 95


Idk all you can do is try it. The have the same dash but the 95 is still obd1 where the 98 is obd2. I belive the ecu is under the hood on the 98 and the 95 has it under the dash. Being that way there will be wires going different places between the two. Anything is possible with enough effort.

I dont think it will,the wires are different colors. I'm having the same problem except mine are 1500,not the z71. I have no idea when it comes to the schematics of each of them and how to wire them under the dash

Your Answer

Add photo

Related Questions

  • 91 z71 2 answers

    My 91 upon trying to take off on second it starts stuttering like it wants to turn off once in 3rd it runs fine

    1991 Chevrolet C/K 1500



  • 1998 Cheyenne, 322,000 miles, codes are misfires, cam/crank sensor's 2 answers

    I have changed the transmission, the cam and crank shaft sensors, i have changed the plugs and wires...and i changed the coil.added seafoam to fuel. changed the EGR valve..that being said, i am still ...

    1998 Chevrolet C/K 1500 Cheyenne Extended Cab LB



  • Are there replacement throttle body fuel injectors for a 1994 350 cu. in. to improve gas mileage 3 answers

    I have a 1994 K1500 Z71 4X4 Off Road Silverado. When I first purchased to truck used I was getting a wonderful 20 mpg city and 22 mpg highway. I had a tune-up a year later with a hotter coil install...

    Chevrolet C/K 1500



  • Engine stall and backfire 1 answer

    My 350 vortec 1992 starts up on, idles rough on all 8 cylinders but when I try to drive off or rev it up, it will pop through the tbi, but if I put my foot in it hard, it revs . When I try to drive...

    1992 Chevrolet C/K 1500 Silverado Extended Cab SB 4WD



  • 97 chevy z71 have to put starter fluid in to start 10 answers

    have to put starter fluid in to start,if I give I hit the gas to fast it will cut out real bad if I press the gas real slow it will rev up like it should,what ya think guys 97 chevy z71 vortic v8 5.7

    1997 Chevrolet C/K 1500


    Maintenance & Repair

C/K 1500

Looking for a Used C/K 1500 in your area?

CarGurus has 910 nationwide C/K 1500 listings starting at $2,500.


Search Chevrolet C/K 1500 Questions

Chevrolet C/K 1500 Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 3,230
#2 John Saffrahn
John Saffrahn
Reputation 2,480
#3 Rowefast
Reputation 1,940
View All

Related Models For Sale

Used GMC Sierra 1500
824 Great Deals out of 66,041 listings starting at $1,995
Used Ford F-150
2,229 Great Deals out of 208,628 listings starting at $1,499
Used Chevrolet C/K 2500
214 listings starting at $5,900
Used Dodge Ram 1500
434 Great Deals out of 11,301 listings starting at $1,000
Used Chevrolet Camaro
154 Great Deals out of 32,700 listings starting at $1,995
Used Chevrolet Tahoe
566 Great Deals out of 27,189 listings starting at $999
Used Toyota Tacoma
487 Great Deals out of 38,724 listings starting at $2,900
Used Chevrolet C/K 3500
252 listings starting at $3,550
Used Chevrolet S-10
13 Great Deals out of 1,355 listings starting at $1,595