GM 75 Digital EGR Solenoid 1 Circuit Error
How to read it
Code 75 reads as 7 flashes, pause, 5 flashes on the check-engine light. Jump terminals A and B on the ALDL connector with the key off, then turn the key on with the engine off and count the check-engine flashes.
New to flash codes? The How to Read GM OBD-I Codes with a Paperclip walks through the test and what the numbers mean. The general OBD-I guide covers the rest.
What does GM code 75 mean?
Digital EGR Solenoid 1 Circuit Error
Common causes of 75
- Failed EGR solenoid winding
- Carbon stuck EGR pintle
- Open or shorted solenoid wiring
- Clogged EGR passages
How to fix 75
- Read codes with a paperclip jumper
- Unplug the EGR valve and inspect pins for corrosion
- Test each solenoid winding resistance
- Command the EGR with a scan tool if supported and listen for clicks
- Clean passages and test pintle movement
- Replace the valve assembly if solenoid 1 tests bad
Source
Qualified source review
Sources and review
Review: qualified. Read the source limits below.
- GM and Chevrolet OBD1 Trouble Codes (ALDL Fault Code List)
live reference page (troublecodes.net)
Supports: code identity and GM meaning
Fetched directly. Single publisher, so the record is qualified, not verified. Causes and check order are curator-written from the circuit the code names.
https://www.troublecodes.net/gm/
Last updated 2026-09-19.
Report a correction for 75. Include your vehicle, the issue and a source if you have one.