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After installing a 6.2 engine, the speedometer and tachometer do not work?

Tiny
MIKEY3945
  • MEMBER
  • 1975 CHEVROLET 1500
  • V8
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
I installed a 6.2 525hp w/ a6l80 transmission. I have no tachometer or speedometer readings. I bought the connect and cruise package. Is there a wiring diagram for my build?

thx mike sweeney
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Saturday, May 20th, 2023 AT 3:52 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,254 POSTS
Hi,

When you installed the 6.2L, did you use the engine control modules for the engine and transmission? Also, do you know the model year of the engine and trans used?

The best I'm going to have are the schematics for the specific year engine/transmission in a specific vehicle. Let me know if that will help.

Take care,

Joe
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Sunday, May 21st, 2023 AT 12:04 AM

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