GMC C1500 Engine Ping

My Truck Makes A Strange Pinging Noise When Accelerating From A Dead Stop. Like A Cross Between A Worn Tranny Mount And Bad Ujoints. I've...

When Im On The Highway Driving Passing Up Another Car When I Give It Gas The Engine Is Pinging Or Something It Sounds Marbles In The Engine...

My Engine Is Pinging And I Think It's My Timing Not Sure Would An Engine Ping Under Load More Than It Would Under No Load Cause Only Waay It...