95 Tahoe service engine soon light

95nstyln

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As the title suggests, i have a 95 tahoe 5.7L. Recently the service engine light came on while i was driving. The light only comes on when the truck is warm (bout 10-15 min into the drive). After parking for a few hours it goes away, i was on my way and again she warmed up and the light returned. I recently replaced the radiator and hoses and noticed the oil and tranny coolant lines need to be replaced soon. The thermostat was replaced about 5 months ago along with steering/suspension work. The truck does not feel any different when the light comes on and drives fine. I dont live far from my job so it usually only goes 5-10 miles with the light on. I am currently in another state for business and will be gone about a week and plan on the paperclip obd1 trick to pull the exact code as soon as i get back.

Any ideas on what this could be? Kinda stressing over this and would appreciate any help.

Thanks
 

lesterl

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O2 sensor? EGR Valve?

Give us the codes and we can help track this down, these TBI trucks are pretty easy to work on...
 

95nstyln

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Thanks for the help i pulled code 32 from the truck this evening. The EGR. How easy is this to replace and how necessary is it? Undrivable?

Thanks
 

lesterl

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EGR is not hard to replace, it is hard to find a good one (GO OEM ONLY on this part!!!!!)

Some say EGR wont affect anything, I had loss of MPG when I bypassed mine. I would look for a reason you got the 32, my TBI base gasket was actually blown one time and got a 32......
 
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