Two problems related to automatic transmission cooler have been reported for the 1997 GMC Jimmy. The most recently reported issues are listed below.
Transmission failure / replaced transmission - upper & lower ball joint failure / replaced upper & lower ball joints - rear window wiper failure / inoperable at this point - extremely expensive replacements with no old parts available at this point. Events leading up to failure I can only attribute to severely poor manufacturing of products, there was no operating misuse or abuse. Also other parts that have failed and have since been replaced are the: alternator, fuel pump, fuel pressure regulator and cooling system failures.
Transmission has a history of "shifting hard" between 1st and 2nd, especially when warm. During a routine oil change, mechanic noticed a "rusted trans dip stick". Though protested by gm as a defect, extended warenty covered. I had to go elsewhere for trans flush, dealer did not have equipment. Problem persists through 2000. Trasmission overheated on hwy causing overflow and slipage. Dealer found "rust in radiator" and "debrise in trans". Had to replace radiator/flush engine and trans. At my expense 1/2001. Now, with warmer weather, trans. Oil is "varnished" and shift hard between 1 & 2nd again just 5000 miles later. Engine lite on. . Read more...