You may be able to reach the knock sensor connecters and plug them in from under the truck by reaching up above the trans right at the rear of the engine. Might save you from removing the intake IF the pigtail is located out the rear of the valley. Also make sure the bolt that fastens the knock sensor to the block is tight and of course check for spare parts such as sockets, nuts, bolts, etc. in the engine valley. If these parts are present they can rattle around and send a false signal via the sensor to the PCM.
Last edited by DYNOTECH; 02-16-2010 at 08:14 AM.