What size are the exhaust manifold bolts on a 6.5L GM Diesel?

The exhaust manifold bolts on a 6.5L GM Diesel are typically M10 x 1.5mm. However, it's crucial to verify this with a bolt measurement from your specific vehicle before purchasing replacements. There's a slight chance of variation depending on the year and specific application. Always double-check with a parts catalog using your VIN or engine serial number for definitive confirmation.