1994 GMC Jimmy Engine cooling Problems

“1994/Gmc/Jimmy,s1500,4.3 /6/ my front drver seat rocks when I have to brake suddenly. When it rains brakes lock up, slides before completely stops, drivers side window doesn't work,locks works on ocassions,it rattles when parking or parked.when shutting off shakes completely then shuts off . …”

“Egr valve continually fails (opens) , the engine looses vacume and brakes fail to function. Since 1999 the EGR has been replaced seven (7) times and is currently in a failure mode. In spite of the fact that there have been service bullitens issued with regard to this problem Gmc has refused to address the problem. To date over two thousand dollars has been spent replacing EGR valves. When driving I am in constant fear of the EGR valve failing and coversly, the brakes failing.”

“This is very discouraging because I was LED to believe that GM was one of the better manufacturers. This is the first vehicle my wife and I have purchased together, and we left honda for GM. Replacing our EGR valve on our vacation was a real stress point, especially as we were stranded in superior, wi the first time, and then thunder bay and terrace bay, ontario the next time - we were forced to drive 500 miles without our EGR valve functioning, which makes the vehicle pulse and seem to stall. …”

“Poppits leaking fuel on central port injectors causing fuel to run rich which creates carbon build up in EGR valve. This causes brakes to malfuction because of vacuum. Valve has been replaced or cleaned 4 times. Gmc has been alerted and I am waiting for a response for cost of repairs, est. $800. When the warranty was valid they replaced the EGR valve, I feel they prolonged the problem at the expense of my family's safety and money. The warranty is no longer valid but the problem still exist. I fear for my safety and the safety of others in my path. …”

“Egr valve controls all vacuum systems also. So when the part fails you lose all brakes and power. You will suddenly find yourself without steering and any *any* braking powers. The failure continues and all the local dealership can do is add new parts to change. Total costs over 2000 dollars in six weeks this last time. Yet with less than three thousand miles on the car with the last EGR valve the part failed. We have had three in the last six months. We have replaced nine in less than four years. This part can only be bought from the dealership at costs from 250 - 400 dollars. …”