I am right at the 100k mark and would like to make it to 200k.

I installed new shocks and struts
Changed transmission fluid
replace front brake pads
replaced engine coolant fluid
replaced spark plugs
changed oil and all filters.
and had 4 wheel alignment.

Is there any thing else I need to do?

 

Now that you had an alignment done you will need to have it checked periodically. The. Only s to k adjustment is toe.if things get changed with worn parts everything will be off.

 

Welcome to the site! Seems like you have it covered,
I'd check the timing chain tensioner also to ensure it is the new style, but if it is not noisey on start up it isn't critical.
Check those LCA rear bushings and the sway bar bushings
I'm at 195,000 miles the bushing on the right is my second set of LCA GM bushings installed about 4 years ago at about 100,000 miles!
The bushing on the left is the new Moog K200792 problem solver , not a rubber bushing but a bearing

 

I just did the timing chain, balance shaft chain, and tensioner. this way it's good for another 100k.

 

Purge the injectors and top end motor, lotta crap built up in there I guarantee,
Especially if you use discount 87 oct.
Serpentine belt if its never been done.

 

I see you replaced the spark plugs but what about the coil packs. I must admit I got mine ac delco from amazon. only 24 a piece. I use all ac delco parts on my hhr 07 2 lt


hope it helps

 

Why replace the coil packs if they Yun arent bad?

 

i just had to replace the coil on my 2006....single unit....i was getting a P0303 along with a misfire. 98K miles...also, that MOOG lower arm/rear bearing looks great..but, unless i missed something, the MOOG page doesn't show an appliction for the HHR....maybe the cobalt ones fit..??...already replaced mine with MOOG rubber bushings awhile back..

http://www.moogproblemsolver.com/moo...ings_Sheet.pdf

 

The original poster has not been back since posting this thread. That is almost a month. Probably was not an important topic to him.

 

Well this isn't the Aston Martin forum, so I'm sure interests vary, because the hhr is so utilitarian, love mine, but some just poke in to ask a question, and don't even come back for the answer. Doesn't matter.