I have an '02 gmc 1500 with the 5.3L w/ auto trans. I need to know where the EGR valve is located on my engine. It's like trying to find Waldo. I found and replaced my PCV valve. And my other question is how did my fuel economy go from 20MPG or 15L/100KM to nearly 17L/100km from one tank to the next. I keep idling to a minimum and rarely rev it beyond 2500RPM. I think the Egr valve might be the culprit. At least I'm hoping it is since the PCV cost $3 and the egr costs $191!
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No it must just be winter gas. Plus a lot more
Gas stations are using up to 10% ethanol which is like burning water
Cause it gets horrible mileage yet costs the same. You can thank the
Government for that! Just keep up your maintenance. From my experience with all the vortec motors.....4.3l gets 10.5l/100km...4.8l gets 12.5l/100km and the 5.3l gets from 14.5l/100km to 16.5l/100km depending on how you drive it. Hope you know metric! And the 6.0l is putting oil companies children through college haha
The first thing i did when i bought my truck was run 3 tanks on each grade of gas and i was surprised to find that regular gas gave me the best mileage. i don't know metric but i will see if i can find a conversion rate.