So I changed my review after finding out Insight hadn't done their homework and left ALL 2002 GMC Vehicles with LB7 Duramax diesel engines for engine oil pressure (EOP) PID support vehicle list. Can you believe it! I mean it doesn't make sense because LB7 and Allison 1000 Transmission were installed on the Silverado/Sierra 2500HD before early 2004. They were all the same truck with some quality fixes like fixing fuel injection issues in the early 2002 versions. This was fixed when the GM injectors were recalled. I really hate how companies don't do their homework before releasing their products. The above facts are well known in the automotive and consumer industries. Oil pressure is probably the MOST IMPORTANT PID, especially when the stepper motor on the dash is known to be garbage, causing the oil gauge to go to zero or the needle to jump, which is basically useless. You need to add 02 to the list asap to get it right. This damn thing is extremely expensive NOT to get an EOP PID.
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