2005 GMC Sierra Hybrid - battery access cover

[polishpickles]

Hi guys,

 

Just wanted to see if anyone can figure this one out. The other day somehow the small battery access cover got lost in my truck. Could have been my dog that possibly knocked it out of its place when jumping in. I found the replacement part online - or so I thought.

 

This link is what I need - part #4 @ $6.01

http://parts.arniebauer.com/a/GMC_2005_Sierra-150053L-ELECTRICGAS-V8-AutomaticHybrid/_56655_6397598/ELECTRICAL-COMPONENTS-Hybrid-Battery-Compartment-Air-Conditioning-Case-Cover/GQ05185.html

 

But when I do a search online for that particular part 21996581 to double check it's the right one, I get some results showing me the other cover which I already have - #5 in this diagram.

http://www.chevroletonlineparts.com/auto-parts/2005/chevrolet/silverado-1500/hybrid-trim/5-3l-v8-electric-gas-engine/electrical-cat/electrical-components-scat/?part_number=21996581

 

So I'm a bit confused if that is in fact the right part (#4 in first link), or if I'm going to order the other cover which I already have (#5 in the 2nd link). I hope this makes sense... I have attached an image of which cover I'm missing. Thank you in advance.