Thank you i think you just solved my problem. The service engine soon light came on and i was going down the road so i went to the house and parked it, it was kinda rattlling about 1700 rpm
In 1st. Its an 02 im gonna flush it tomorrow and hope theres no metal shavings then im gonna replace the shift solenoid b and that will fix it if theres no metal shavings. The code is P0755 for other people looking at this. Ill tell you how it goes once finished. And ironically our trucks histories are simular i bought from an older man as well and mine has 118,000 miles you might change the ignition coils soon or cyclinder #8 will start misfiring and could mess with your cadilac convertor and start a fire.