I have 1990 chevy suburban 350- 1500 -4x4 The service engine light comes on after 10 minutes of freeway driving and stays on till the engine is shut off. It only does this at high speeds. The light never comes on while driving around town.
I checked for codes and it is code" 32", suggesting the EGR circuit loop error. The obvious area to look is the EGR, but are there other cuases to trip this code?
Thanks in advance chris