my 20003 cad cts 3.2 eng is getting 20 mpg.It has120k miles on it.I had dtc po128.found coolant bypass valve inoperable.found vac. sourse not present.vac line was rubbed through at a/c pulley.I had to put it in the GM shop to repair it..when the check eng. lite came on I thought the milage dropped.I had the car at the ford dealer where I bought It for about 2 or 3 wks and they finally sent it to GM.to fix it.
the check eng lite is off.
I put the average mpg.on the message center. It showed 19.2 when I left 20.4 after a 45 mi. drive;
will the milage get as I drive or not??just wishful thinking huh lol thank you
I bought this car used a couple months ago so dont know mucc abuot it really
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thanks 1clubinside I appreciate it