Out of curiosity what pressure do you run in your tyres ?

Out of curiosity what pressure do you run in your tyres ?

Get some ome springs and take a few leafs out. If I remember right, I ran 3 Leafs in my last Sierra and it was alot comfortable them my mates sierras.

^^^ this.

tyre placard says 19psi for stock tyres... as you go up in tyre size you should technically drop pressure from there, however added sidewall height will require slightly higher pressures to keep it stable - but even still, the most i run my 31's at on the road is 26psi front and 22 rear.

other things to consider are your shackle angle and shockies, and if you're running lifted leaves theres an added stiffness there too.

I run 35, just cause thats what the tyre says to run it on haha

That is basically what is in my car and it is smoother than my GQ.

a better quality of seat might also improve comfort for the driver?

i.e. a bit of extra padding around the hips and back might equate the as much of an improvement as the spring swap and tyre pressure changes.

Obviously dropping tyre pressure is a factor for the OP, but there is much truth here.

Ergonomics have ore to do with comfort than almost anything else. Franky, Sierra seats suck. they are too softly padded and too reclined to get comfortable. Quality seats will make a huge difference to the feel of the car, however, they are expensive.

Here's a bunch of little things you can do that make quite a lot of difference. "comfort" is more than just ride quality or any one thing - it's lots of little things added up. If I'm going for a longer road drive with the wife in my car I spend some time making sure it's just a bit tighter and quieter than if it was just me in the car.

How good is your soft top? make sure all the retaining hardware is in good condition. I don't own a soft top, but some I have been in have driven me crazy with the tap-tap-tap of the rear window roll-up straps tapping on the back window - sometimes that's the sort of thing that's enough to make or break a car.

Get some heavy gaffer/aluminium tape and tape up ALL the exposed holes in the interior. There's lots of them and they will leak cold air into the car. You'd be surprised how much difference this makes to a "quality" feel.

Is the bailey channel in the windows in good nick? It often slips down and makes the windows leak air and rattle.

Are the doors cracked? They often crack 1/2 way along the window sill or adjacent to the mirror, and this makes them rattle.

Take the door cards off and check that the inner skin of the door isn't cracked. This leads to flappy door cards and more nasty interior rattly uncouthness.

Do the window frames seal against the door frame? With time, Sierra doors "relax" and they don't seal against the door frame anymore, or they "flap" as you go over bumps. Roll the windows down and tweak the top of the window frames inwards until the door seals properly. Likewise, adjust the hinges and door striker until the doors close properly and "pop" open when the door is opened.

Make sure all the heater controls work and the demist vents are hooked up - they often come adrift.

Pull the heater core out and clean it. the heater will work better and the fan won't make those annoying clicking noises because of the leaves in it.

How is the fit of the tailgate and its rubber seal? These often feet loose, especially if a larger spare tyre is on the back.

Is the exhaust quiet and in good condition?

Are the rubber boots around the shifters in good condition? tears in these can add lots of noise into the cabin. I've added foam between my boots and the body to reduce noise leaks.

Is your exhaust routed out the rear corner or straight out the back? a "straight out the back" exhaust can lead to fumes in the cabbing which can be a major PITA.

tighten all the dash screws. I bet they are a bit loose and this will lead to rattles.

For the driver:

How is your driving position? Sierras have shit ergonomics. The steering wheel is too big and too far away. The seat is too reclined and the pedals normally all end up at different heights. I've spent some time getting this stuff right in my car and it makes a world of difference. Even adjusting the brake and clutch pedals to sit at the same heights (bet they aren't right now) makes a difference to how comfortable the car is.

How well adjusted is the steering box? play in the steering is not only annoying for the driver, it's disconcerting for the passenger too, especially in a SWB car that's not very directionally stable at the best of times.

As for the softest riding bolt in suspension, my vote is ARB/OME, but you need to be aware that you won't get much lift (40mm TOPS) if you choose the right spring. Lots of people choose heavy duty springs because they want over 2" (50mm) of lift and end up with a terrible ride. If you car is light, choose the softest springs you can.

There's some stuff to work on in any case.

There's more to comfort than just spring rate or tyre pressure.

Steve.

Okay, so at the moment im running 2" leaves and my stock shackles are pretty much vertical, will extended shackles be the answer for this? Will they also help with flex and do I need extended shocks too??
Cheers