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82 Silverado 4X · 08-15-2003, 08:10 PM

There is no boss for the 3rd freeze plug on my block. It's casting number is 3951509 and the stamping suffix is TLS. I had the oil pan off to change the oil pan gasket in 94 and it's only a 2 bolt main. My neighbor bought it new in 77 and it has only 54,000 original miles.

08-15-2003, 08:10 PM	#11
82 Silverado 4X Genuine Chevrolet Join Date: Feb 2003 Location: South West Pennsylvania. Posts: 582	There is no boss for the 3rd freeze plug on my block. It's casting number is 3951509 and the stamping suffix is TLS. I had the oil pan off to change the oil pan gasket in 94 and it's only a 2 bolt main. My neighbor bought it new in 77 and it has only 54,000 original miles. __________________ George 82 Silverado LWB 4x4 350 SM465 NP208 77 Chevrolet Blazer Chalet 400 TH350 NP203