Silverado engine shakes when slowing down - Silverado 1500 Chevrolet Cars & Trucks

Sounds like it's time for new plugs.

Have you checked the engine computer for trouble codes ?

you might have a broken eng or trans, mount......if all mounts ok your eng. is missing on one or more cylenders,

look for the idle air bypass valve it sounds like it is stuck open leaving the engine idle at too high of an rpm, that would explian the hard braking because it cant build any vacum for the brake booster to work.

CLOGGED FUEL FILTER OR WEAK FUEL PUMP CAUSE CAR TO HAVE LACK OF POWER AND SURGE.CHANGE FUEL FILTER,CLEAN FUEL INJECTORS WITH CAN SEAFOAM BY ADDING TO 3/4 TO FULL TANK OF GAS.CHECK FUEL PRESSURE SHOULD BE 41 - 47 PSI FOR 2.0L OR 3.1L ENGINES AND 9 - 13 PSI 2.2L TBI INJECTION SYSTEM.IF FUEL PRESSURE GOOD CHECK TRANSMISSION FLUID LEVEL.FAULTY TORQUE CONVERTER WILL CAUSE LACK OF POWER AND ENGINE SURGE.A STOPPED UP MUFFLER OR CATALYTIC CONVERTER WILL TAKE SLOW CAR DOWN MAKE IT SPEED UP SLOW DOWN SPEED UP SLOW DOWN.

The engine will shake when slowing down, because releasing the accelerator drops the rpm of the engine immediately. The engine only "knows" it has slowed down and will shake the same way if standing still.

There are many reasons for the shaking. All are due to needing a tune up. Poor timing, plugs, wires, cap, rotor, etc.

If you need help fixing something, give me a call.

TomE

have vehicle scanned for trouble code some auto stores such as auto zone /advanced auto do it for free the code will give u a start point

Front shocks are week

i would check the coil

I have a 2000 GMC that does that also, only mine wont slow down unless i turn it off and retsart, only does it when engine is really warm.