Help swapped engine and now it won’t turn over

[Cocobug1999]

I recently purchased an 04 Tahoe with 198k miles. Truck had been sitting for a couple months. I put a hot battery in it and it fired up. The oil was sludgy so I changed it a couple times hoping it would be okay well cylinder number 3 rod bearing spun. So I bought a used motor that ran to replace it with. Freshened up the new motor and installed it and now the vehicle has a no crank issue. All the lights come on and it has power but will not spin over. Starter relay clicks but starter will not engage. Please help!?!

 

[nonickatall]

Did you mount all mass points and connectors properly?

check everything again...

 

[Cocobug1999]

Yes. I went over the whole motor all the grounds. I forgot a wire ate first on the ground under the ps pump. Cleaned the block and bolted both back up. When I attempt to crank it the dash lights dim and then come back on when I let off the key

 

[nonickatall]

Are you sure the batterie is loaded?

 

[nonickatall]

Did you use your starter or is it from the swapped maschine? Have you tried cranking the engine at the front flywheel to check whether the engine rotates freely?

 

[Joseph Garcia]

^^^^^x2^^^^^