Ignitions and Electrical Wiring Harnesses

Holley

1978-88 G BODY INSTRUMENT CLUSTER O

$1,210.50

SKU: H00E CH78OE

Out of Stock
In Stock
Ships by Jun 9
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

All-electric cluster for Chevy G-Body (1978-1988), features speedometer, tachometer, clock, fuel, oil, temp, and volt gauges in an OE style. Available with or without overdrive. Hybrid LED Lighting for original perimeter feel and backlight visibility. Includes turn signals, high beam indicators (original locations), new check engine and high beam sockets with LED bulbs, wiring harness, push-button speedometer calibration, new acrylic lens, and built-in ECM signal filter switch. Utilizes Classic Instruments' Zeus Speedometer Technology (no external control boxes, works with ECM/VSS signals). Fuel gauge programmable for various ohm ranges. Includes GM sending unit kit. Installs with existing diffuser.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandHolley
Part NumberH00E CH78OE

Videos

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy